diff --git a/Gemfile b/Gemfile
index 9c3eda3f..9c571657 100644
--- a/Gemfile
+++ b/Gemfile
@@ -23,6 +23,8 @@ gem 'omniauth-github'
 
 # Use cancancan as authorization framework
 gem 'cancancan'
+# Use rolify to set roles
+gem 'rolify'
 
 # Use transitions as state machine
 gem 'transitions', :require => %w( transitions active_record/transitions )
diff --git a/Gemfile.lock b/Gemfile.lock
index bf7fb167..7420a87d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -299,6 +299,7 @@ GEM
     request_store (1.0.6)
     rest-client (1.6.7)
       mime-types (>= 1.16)
+    rolify (3.4.0)
     rspec (3.0.0)
       rspec-core (~> 3.0.0)
       rspec-expectations (~> 3.0.0)
@@ -445,6 +446,7 @@ DEPENDENCIES
   rails-observers
   rdoc-generator-fivefish
   redcarpet
+  rolify
   rspec-activemodel-mocks
   rspec-rails
   rubocop
diff --git a/app/assets/stylesheets/osem.css.scss b/app/assets/stylesheets/osem.css.scss
index 4c4353c0..46e5d747 100644
--- a/app/assets/stylesheets/osem.css.scss
+++ b/app/assets/stylesheets/osem.css.scss
@@ -168,3 +168,7 @@ body {
   -webkit-flex: 2;
   flex: 2;
 }
+
+.table20 {
+  width: 20%;
+}
diff --git a/app/controllers/admin/base_controller.rb b/app/controllers/admin/base_controller.rb
new file mode 100644
index 00000000..036aec62
--- /dev/null
+++ b/app/controllers/admin/base_controller.rb
@@ -0,0 +1,17 @@
+module Admin
+  class BaseController < ApplicationController
+    before_filter :verify_user_admin
+
+    def verify_user_admin
+      if (current_user.nil?)
+        redirect_to new_user_session_path
+        return false
+      end
+      unless (current_user.has_role? :organizer, :any) || (current_user.has_role? :cfp, :any) ||
+             (current_user.has_role? :info_desk, :any) ||
+             (current_user.has_role? :volunteers_coordinator, :any) || current_user.is_admin
+        raise CanCan::AccessDenied.new('You are not authorized to access this area!')
+      end
+    end
+  end
+end
diff --git a/app/controllers/admin/callforpapers_controller.rb b/app/controllers/admin/callforpapers_controller.rb
index 7d4ac3d2..b18d80de 100644
--- a/app/controllers/admin/callforpapers_controller.rb
+++ b/app/controllers/admin/callforpapers_controller.rb
@@ -1,8 +1,10 @@
 module Admin
-  class CallforpapersController < ApplicationController
-    before_filter :verify_organizer
+  class CallforpapersController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+#     load_and_authorize_resource :cfp, class: 'CallForPapers', through: :conference
 
     def show
+      authorize! :show, CallForPapers.new(conference_id: @conference.id)
       @cfp = @conference.call_for_papers
       if @cfp.nil?
         @cfp = CallForPapers.new
@@ -10,6 +12,7 @@ module Admin
     end
 
     def update
+      authorize! :update, @conference.call_for_papers
       @cfp = @conference.call_for_papers
       @cfp.assign_attributes(params[:call_for_papers])
       send_mail_on_schedule_public = @cfp.notify_on_schedule_public?
@@ -30,6 +33,7 @@ module Admin
     end
 
     def create
+      authorize! :update, CallForPapers.new(conference_id: @conference.id)
       @cfp = CallForPapers.new(params[:call_for_papers])
       if @cfp.valid?
         @cfp.save
diff --git a/app/controllers/admin/campaigns_controller.rb b/app/controllers/admin/campaigns_controller.rb
index 68c4521d..8a0e3e23 100644
--- a/app/controllers/admin/campaigns_controller.rb
+++ b/app/controllers/admin/campaigns_controller.rb
@@ -1,16 +1,15 @@
 module Admin
-  class CampaignsController < ApplicationController
-    before_filter :verify_organizer
+  class CampaignsController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    load_and_authorize_resource :campaign, through: :conference
 
     def index
-      @conference = Conference.find_by(short_title: params[:conference_id])
+      authorize! :index, Campaign.new(conference_id: @conference.id)
       @campaigns = @conference.campaigns
     end
 
     def create
-      @conference = Conference.find_by(short_title: params[:conference_id])
-      @campaign = @conference.campaigns.new(params[:campaign])
-      @campaign.conference_id = @conference.id
+      @campaign.attributes = params[:campaign]
 
       if @conference.save
         redirect_to(admin_conference_campaigns_path(conference_id: @conference.short_title),
@@ -22,20 +21,11 @@ module Admin
       end
     end
 
-    def new
-      @conference = Conference.find_by(short_title: params[:conference_id])
-      @campaign = @conference.campaigns.new
-    end
+    def new; end
 
-    def edit
-      @conference = Conference.find_by(short_title: params[:conference_id])
-      @campaign = Campaign.find(params[:id])
-    end
+    def edit; end
 
     def update
-      @conference = Conference.find_by(short_title: params[:conference_id])
-      @campaign = Campaign.find(params[:id])
-
       if @campaign.update_attributes(params[:campaign])
         redirect_to(admin_conference_campaigns_path(
                         conference_id: @conference.short_title),
@@ -50,8 +40,6 @@ module Admin
     end
 
     def destroy
-      @conference = Conference.find_by(short_title: params[:conference_id])
-      @campaign = Campaign.find(params[:id])
       if @campaign.destroy
         redirect_to(admin_conference_campaigns_path(conference_id: @conference.short_title),
                     notice: "Campaign '#{@campaign.name}' successfully deleted.")
diff --git a/app/controllers/admin/commercials_controller.rb b/app/controllers/admin/commercials_controller.rb
index a624a191..2a41b2dc 100644
--- a/app/controllers/admin/commercials_controller.rb
+++ b/app/controllers/admin/commercials_controller.rb
@@ -1,7 +1,7 @@
 module Admin
-  class CommercialsController < ApplicationController
-    before_action :set_conference
-    before_action :set_commercial, only: [:edit, :update, :destroy]
+  class CommercialsController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    load_and_authorize_resource through: :conference, except: [:new, :create]
 
     def index
       @commercials = @conference.commercials
@@ -9,13 +9,14 @@ module Admin
 
     def new
       @commercial = @conference.commercials.build
+      authorize! :create, @conference.commercials.new
     end
 
-    def edit
-    end
+    def edit; end
 
     def create
       @commercial = @conference.commercials.build(commercial_params)
+      authorize! :create, @commercial
 
       if @commercial.save
         redirect_to admin_conference_commercials_path,
@@ -43,14 +44,6 @@ module Admin
 
     private
 
-    def set_commercial
-      @commercial = @conference.commercials.find(params[:id])
-    end
-
-    def set_conference
-      @conference = Conference.find_by(short_title: params[:conference_id])
-    end
-
     def commercial_params
       #params.require(:commercial).permit(:commercial_id, :commercial_type)
       params[:commercial]
diff --git a/app/controllers/admin/conference_controller.rb b/app/controllers/admin/conference_controller.rb
index d463076f..8d7489c6 100644
--- a/app/controllers/admin/conference_controller.rb
+++ b/app/controllers/admin/conference_controller.rb
@@ -1,6 +1,7 @@
 module Admin
-  class ConferenceController < ApplicationController
-    before_filter :verify_organizer
+  class ConferenceController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    load_resource :user, only: [:remove_user]
 
     def index
       # Redirect to new form if there is no conference
@@ -63,8 +64,11 @@ module Admin
 
     def create
       @conference = Conference.new(params[:conference])
+
       if @conference.valid?
         @conference.save
+        # user that creates the conference becomes organizer of that conference
+        current_user.add_role :organizer, @conference
         redirect_to(admin_conference_path(id: @conference.short_title),
                     notice: 'Conference was successfully created.')
       else
@@ -108,6 +112,7 @@ module Admin
       if @conference.update_attributes(params[:conference])
         Mailbot.delay.conference_date_update_mail(@conference) if notify_on_conf_dates_updates
         Mailbot.delay.conference_registration_date_update_mail(@conference) if notify_on_conf_reg_dates_updates
+
         redirect_to(edit_admin_conference_path(id: @conference.short_title),
                     notice: 'Conference was successfully updated.')
       else
@@ -186,12 +191,47 @@ module Admin
 
     def edit
       @conferences = Conference.all
-      @conference = Conference.find_by(short_title: params[:id])
       @date_string = date_string(@conference.start_date, @conference.end_date)
       respond_to do |format|
         format.html
         format.json { render json: @conference.to_json }
       end
     end
+
+    def roles
+      @user = User.new
+      @roles = Role::ACTIONABLES + Role::LABELS
+
+      params[:user] ? (@selection = params[:user][:roles].parameterize.underscore) : (@selection = 'organizer')
+      @role_users = get_users(@selection)
+    end
+
+    def add_user
+      @user = User.find_by(email: params[:user][:email])
+      @selection = params[:role].parameterize.underscore
+      @user.add_role @selection.to_sym, @conference
+
+      @role_users = get_users(@selection)
+      render 'roles', formats: [:js]
+    end
+
+    def remove_user
+      @selection = params[:role]
+      @user.revoke @selection.to_sym, @conference
+
+      @role_users = get_users(@selection)
+      render 'roles', formats: [:js]
+    end
+
+    protected
+
+    def get_users(role_name)
+      @role_users = {}
+      # Initialize @role variable, so that view can show the role description
+      @role = Role.where(name: role_name, resource: @conference)
+      @role.blank? ? @role_users[role_name] = @role : @role_users[role_name] = @role.first.users
+
+      @role_users
+    end
   end
 end
diff --git a/app/controllers/admin/contacts_controller.rb b/app/controllers/admin/contacts_controller.rb
index 6d97db98..a8cda01a 100644
--- a/app/controllers/admin/contacts_controller.rb
+++ b/app/controllers/admin/contacts_controller.rb
@@ -1,12 +1,13 @@
 module Admin
-  class ContactsController < ApplicationController
-    before_action :set_conference
-    before_action :set_conference
-    before_action :set_contact, only: [:edit, :update]
+  class ContactsController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    load_and_authorize_resource through: :conference, singleton: true
+
+    # GET /:conference/contact
+    def show; end
 
     # GET /:conference/contact/edit
-    def edit
-    end
+    def edit; end
 
     # PATCH/PUT /:conference/contact
     def update
@@ -19,15 +20,6 @@ module Admin
 
     private
 
-    # Use callbacks to share common setup or constraints between actions.
-    def set_contact
-      @contact = @conference.contact
-    end
-
-    def set_conference
-      @conference = Conference.find_by(short_title: params[:conference_id])
-    end
-
     # Only allow a trusted parameter "white list" through.
     def contact_params
       # params.require(:contact).permit(:social_tag, :email, :facebook, :googleplus, :twitter, :instagram, :public)
diff --git a/app/controllers/admin/dietchoices_controller.rb b/app/controllers/admin/dietchoices_controller.rb
index 043a6577..2720577c 100644
--- a/app/controllers/admin/dietchoices_controller.rb
+++ b/app/controllers/admin/dietchoices_controller.rb
@@ -1,6 +1,7 @@
 module Admin
-  class DietchoicesController < ApplicationController
-    before_filter :verify_organizer
+  class DietchoicesController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    load_and_authorize_resource :dietary_choice, through: :conference
 
     def show
       render :diets_list
diff --git a/app/controllers/admin/difficulty_levels_controller.rb b/app/controllers/admin/difficulty_levels_controller.rb
index f32dc8d9..cfab7528 100644
--- a/app/controllers/admin/difficulty_levels_controller.rb
+++ b/app/controllers/admin/difficulty_levels_controller.rb
@@ -1,9 +1,10 @@
 module Admin
-  class DifficultyLevelsController < ApplicationController
-    before_filter :verify_organizer
+  class DifficultyLevelsController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    authorize_resource through: :conference
 
     def index
-      @conference = Conference.find_by(short_title: params[:conference_id])
+      authorize! :index, DifficultyLevel.new(conference_id: @conference.id)
     end
 
     def update
diff --git a/app/controllers/admin/emails_controller.rb b/app/controllers/admin/emails_controller.rb
index e4489180..b0f0a26c 100644
--- a/app/controllers/admin/emails_controller.rb
+++ b/app/controllers/admin/emails_controller.rb
@@ -1,6 +1,7 @@
 module Admin
-  class EmailsController < ApplicationController
-    before_filter :verify_organizer
+  class EmailsController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    load_and_authorize_resource class: EmailSettings
 
     def update
       @conference.email_settings.update_attributes(params[:email_settings])
@@ -10,6 +11,7 @@ module Admin
     end
 
     def index
+      authorize! :index, @conference.email_settings
       @settings = @conference.email_settings
     end
   end
diff --git a/app/controllers/admin/eventtypes_controller.rb b/app/controllers/admin/event_types_controller.rb
similarity index 52%
rename from app/controllers/admin/eventtypes_controller.rb
rename to app/controllers/admin/event_types_controller.rb
index 616b4318..f6cfaab2 100644
--- a/app/controllers/admin/eventtypes_controller.rb
+++ b/app/controllers/admin/event_types_controller.rb
@@ -1,6 +1,11 @@
 module Admin
-  class EventtypesController < ApplicationController
-    before_filter :verify_organizer
+  class EventTypesController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    authorize_resource :event_type, through: :conference
+
+    def index
+      authorize! :index, EventType.new(conference_id: @conference.id)
+    end
 
     def show
       render :eventtypes
@@ -8,11 +13,11 @@ module Admin
 
     def update
       @conference.update_attributes!(params[:conference])
-      redirect_to(admin_conference_eventtypes_path(
+      redirect_to(admin_conference_event_types_path(
                   conference_id: @conference.short_title),
                   notice: 'Event types were successfully updated.')
     rescue => e
-      redirect_to(admin_conference_eventtypes_path(
+      redirect_to(admin_conference_event_types_path(
                   conference_id: @conference.short_title),
                   alert: "Event types update failed: #{e.message}")
     end
diff --git a/app/controllers/admin/events_controller.rb b/app/controllers/admin/events_controller.rb
index 99dbfbc2..1b534f33 100644
--- a/app/controllers/admin/events_controller.rb
+++ b/app/controllers/admin/events_controller.rb
@@ -1,6 +1,7 @@
 module Admin
-  class EventsController < ApplicationController
-    before_filter :verify_organizer
+  class EventsController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    load_and_authorize_resource :event, through: :conference
 
     before_action :get_event, except: [:index, :create]
 
@@ -13,6 +14,8 @@ module Admin
     end
 
     def index
+      authorize! :index, @conference.events.build
+      @conference = Conference.find_by(short_title: params[:conference_id])
       @events = @conference.events
       @tracks = @conference.tracks
       @machine_states = @events.state_machine.states.map
@@ -121,8 +124,7 @@ module Admin
       redirect_back_or_to(admin_conference_event_path(@conference.short_title, @event))
     end
 
-    def create
-    end
+    def create; end
 
     def accept
       send_mail = @event.conference.email_settings.send_on_accepted
diff --git a/app/controllers/admin/lodgings_controller.rb b/app/controllers/admin/lodgings_controller.rb
index 34dfa628..ce299ed7 100644
--- a/app/controllers/admin/lodgings_controller.rb
+++ b/app/controllers/admin/lodgings_controller.rb
@@ -1,16 +1,16 @@
 module Admin
-  class LodgingsController < ApplicationController
-    before_filter :verify_organizer
+  class LodgingsController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    load_and_authorize_resource :venue, through: :conference, singleton: true
+    authorize_resource :lodging, through: :venue
 
     def index
-      @venue = @conference.venue
+      authorize! :update, Lodging.new(venue_id: @venue.id)
     end
 
-    def show
-    end
+    def show; end
 
     def update
-      @venue = @conference.venue
       if @venue.update_attributes(params[:venue])
         redirect_to(admin_conference_lodgings_path(conference_id: @conference.short_title),
                     notice: 'Lodgings were successfully updated.')
diff --git a/app/controllers/admin/photos_controller.rb b/app/controllers/admin/photos_controller.rb
index fc598d09..14c5dc17 100644
--- a/app/controllers/admin/photos_controller.rb
+++ b/app/controllers/admin/photos_controller.rb
@@ -1,7 +1,7 @@
 module Admin
-  class PhotosController < ApplicationController
-    before_action :set_conference
-    before_action :set_photo, only: [:edit, :update, :destroy]
+  class PhotosController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    load_and_authorize_resource through: :conference
 
 # GET /admin/photos
     def index
@@ -14,8 +14,7 @@ module Admin
     end
 
 # GET /admin/photos/1/edit
-    def edit
-    end
+    def edit; end
 
 # POST /admin/photos
     def create
@@ -46,16 +45,6 @@ module Admin
 
     private
 
-# Use callbacks to share common setup or constraints between actions.
-    def set_conference
-      @conference = Conference.find_by(short_title: params[:conference_id])
-    end
-
-# Use callbacks to share common setup or constraints between actions.
-    def set_photo
-      @photo = Photo.find_by(id: params[:id])
-    end
-
 # Only allow a trusted parameter "white list" through.
     def photo_params
       params[:photo]
diff --git a/app/controllers/admin/questions_controller.rb b/app/controllers/admin/questions_controller.rb
index 240909cd..a9da703b 100644
--- a/app/controllers/admin/questions_controller.rb
+++ b/app/controllers/admin/questions_controller.rb
@@ -1,23 +1,24 @@
 module Admin
-  class QuestionsController < ApplicationController
-    before_filter :verify_organizer
+  class QuestionsController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    load_and_authorize_resource through: :conference, except: [:new, :create]
 
     def index
-      @conference = Conference.find_by(short_title: params[:conference_id])
+      authorize! :index, Question.new(conference_id: @conference.id)
       @questions = Question.where(global: true).all | Question.where(conference_id: @conference.id)
       @questions_conference = @conference.questions
       @new_question = @conference.questions.new
     end
 
     def new
-      @conference = Conference.find_by(short_title: params[:conference_id])
-      @new_question = @conference.questions.new
+      @question = Question.new(conference_id: @conference.id)
+      authorize! :create, @question
     end
 
     def create
-      @conference = Conference.find_by(short_title: params[:conference_id])
       @question = @conference.questions.new(params[:question])
       @question.conference_id = @conference.id
+      authorize! :create, @question
 
       respond_to do |format|
         if @conference.save
@@ -31,19 +32,13 @@ module Admin
 
     # GET questions/1/edit
     def edit
-      @conference = Conference.find_by(short_title: params[:conference_id])
-      @question = Question.find(params[:id])
-
-      if @question.global == true && !has_role?(current_user, "Admin")
+      if @question.global
         redirect_to(admin_conference_questions_path(conference_id: @conference.short_title), alert: "Sorry, you cannot edit global questions. Create a new one.")
       end
     end
 
     # PUT questions/1
     def update
-      @conference = Conference.find_by(short_title: params[:conference_id])
-      @question = Question.find(params[:id])
-
       if @question.update_attributes(params[:question])
         redirect_to(admin_conference_questions_path(conference_id: @conference.short_title), notice: "Question '#{@question.title}' for #{@conference.short_title} successfully updated.")
       else
@@ -53,8 +48,7 @@ module Admin
 
     # Update questions used for the conference
     def update_conference
-      @conference = Conference.find_by(short_title: params[:conference_id])
-
+      authorize! :update, Question.new(conference_id: @conference.id)
       if @conference.update_attributes(params[:conference])
         redirect_to(admin_conference_questions_path(conference_id: @conference.short_title), notice: "Questions for #{@conference.short_title} successfully updated.")
       else
@@ -64,19 +58,17 @@ module Admin
 
     # DELETE questions/1
     def destroy
-      if has_role?(current_user, "Admin")
-        @question = Question.find(params[:id])
-
+      if can? :destroy, @question
         # Do not delete global questions
-        if @question.global == false
+        if !@question.global
 
           # Delete question and its answers
           begin
             Question.transaction do
 
-              @question.delete
+              @question.destroy
               @question.answers.each do |a|
-                a.delete
+                a.destroy
               end
               flash[:notice] = "Deleted question: #{@question.title} and its answers: #{@question.answers.map {|a| a.title}.join ','}"
             end
diff --git a/app/controllers/admin/registrations_controller.rb b/app/controllers/admin/registrations_controller.rb
index 6ebe3db0..bc17b1ff 100644
--- a/app/controllers/admin/registrations_controller.rb
+++ b/app/controllers/admin/registrations_controller.rb
@@ -1,8 +1,10 @@
 module Admin
-  class RegistrationsController < ApplicationController
-    before_filter :verify_organizer
+  class RegistrationsController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    load_and_authorize_resource through: :conference
 
     def index
+      authorize! :show, Registration.new(conference_id: @conference.id)
       session[:return_to] ||= request.referer
       @pdf_filename = "#{@conference.title}.pdf"
       @registrations = @conference.registrations.includes(:user)
@@ -12,7 +14,6 @@ module Admin
     end
 
     def change_field
-      @registration = Registration.find(params[:id])
       field = params[:view_field]
       if @registration.send(field.to_sym)
         @registration.update_attribute(:"#{field}", 0)
@@ -26,12 +27,10 @@ module Admin
     end
 
     def edit
-      @registration = @conference.registrations.where('id = ?', params[:id]).first
       @user = User.where('id = ?', @registration.user_id).first
     end
 
     def update
-      @registration = @conference.registrations.where('id = ?', params[:id]).first
       @user = User.where('id = ?', @registration.user_id).first
       begin
         @user.update_attributes!(params[:registration][:user_attributes])
@@ -55,6 +54,7 @@ module Admin
     def new
       @user = User.new
       @registration = @user.registrations.new
+      @registration.conference_id = @conference.id
       @supporter_registration = @conference.supporter_registrations.new
     end
 
@@ -97,7 +97,7 @@ module Admin
     end
 
     def destroy
-      if has_role?(current_user, 'Admin')
+      if can? :destroy, @registration
         registration = @conference.registrations.where(id: params[:id]).first
         user = User.where('id = ?', registration.user_id).first
 
diff --git a/app/controllers/admin/rooms_controller.rb b/app/controllers/admin/rooms_controller.rb
index ea2cd3f5..0acb9586 100644
--- a/app/controllers/admin/rooms_controller.rb
+++ b/app/controllers/admin/rooms_controller.rb
@@ -1,6 +1,11 @@
 module Admin
-  class RoomsController < ApplicationController
-    before_filter :verify_organizer
+  class RoomsController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    authorize_resource through: :conference
+
+    def index
+      authorize! :index, Room.new(conference_id: @conference.id)
+    end
 
     def show
       render :rooms_list
diff --git a/app/controllers/admin/schedules_controller.rb b/app/controllers/admin/schedules_controller.rb
index cd7fff2b..0a939db8 100644
--- a/app/controllers/admin/schedules_controller.rb
+++ b/app/controllers/admin/schedules_controller.rb
@@ -1,10 +1,14 @@
 module Admin
-  class SchedulesController < ApplicationController
-    before_filter :verify_organizer
+  class SchedulesController < Admin::BaseController
+    # By authorizing 'conference' resource, we can ensure there will be no unauthorized access to
+    # the schedule of a conference, which should not be accessed in the first place
+    load_and_authorize_resource :conference, find_by: :short_title
+
     skip_before_filter :verify_authenticity_token, only: [:update]
     layout 'schedule'
 
     def show
+      authorize! :update, @conference.events.new
       if @conference.nil?
         redirect_to admin_conference_index_path
         return
@@ -14,6 +18,7 @@ module Admin
     end
 
     def update
+      authorize! :update, @conference.events.new
       event = Event.where(guid: params[:event]).first
       error_message = nil
       if event.nil?
diff --git a/app/controllers/admin/social_events_controller.rb b/app/controllers/admin/social_events_controller.rb
index c3f82ee8..bc8dae88 100644
--- a/app/controllers/admin/social_events_controller.rb
+++ b/app/controllers/admin/social_events_controller.rb
@@ -1,6 +1,7 @@
 module Admin
-  class SocialEventsController < ApplicationController
-    before_filter :verify_organizer
+  class SocialEventsController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    authorize_resource :social_event, through: :conference
 
     def show
       render :social_events_list
diff --git a/app/controllers/admin/speakers_controller.rb b/app/controllers/admin/speakers_controller.rb
index 76fd40ce..d3dfe700 100644
--- a/app/controllers/admin/speakers_controller.rb
+++ b/app/controllers/admin/speakers_controller.rb
@@ -1,15 +1,17 @@
 module Admin
-  class SpeakersController < ApplicationController
-    before_filter :verify_organizer
+  class SpeakersController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    load_and_authorize_resource :event
+
     respond_to :js, :html
 
     def edit
-      @event = @conference.events.find(params[:event_id])
+      authorize! :update, @conference.events.new
       @speaker = @event.event_users.where(event_role: 'speaker').first
     end
 
     def update
-      @event = @conference.events.find(params[:event_id])
+      authorize! :update, @conference.events.new
       @speaker = @event.event_users.where(event_role: 'speaker').first
       @speaker.user_id = params[:speaker][:user_id]
       @speaker.save
diff --git a/app/controllers/admin/sponsors_controller.rb b/app/controllers/admin/sponsors_controller.rb
index d37c1cb4..26d1df6e 100644
--- a/app/controllers/admin/sponsors_controller.rb
+++ b/app/controllers/admin/sponsors_controller.rb
@@ -1,6 +1,11 @@
 module Admin
-  class SponsorsController < ApplicationController
-    before_filter :verify_organizer
+  class SponsorsController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    authorize_resource :sponsor, through: :conference
+
+    def index
+      authorize! :index, Sponsor.new(conference_id: @conference.id)
+    end
 
     def update
       if @conference.update_attributes(params[:conference])
diff --git a/app/controllers/admin/sponsorship_levels_controller.rb b/app/controllers/admin/sponsorship_levels_controller.rb
index 1d0a61bc..134295e3 100644
--- a/app/controllers/admin/sponsorship_levels_controller.rb
+++ b/app/controllers/admin/sponsorship_levels_controller.rb
@@ -1,6 +1,11 @@
 module Admin
-  class SponsorshipLevelsController < ApplicationController
-    before_filter :verify_organizer
+  class SponsorshipLevelsController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    authorize_resource through: :conference
+
+    def index
+      authorize! :index, SponsorshipLevel.new(conference_id: @conference.id)
+    end
 
     def update
       if @conference.update_attributes(params[:conference])
diff --git a/app/controllers/admin/stats_controller.rb b/app/controllers/admin/stats_controller.rb
index c98b9892..a6ba21b8 100644
--- a/app/controllers/admin/stats_controller.rb
+++ b/app/controllers/admin/stats_controller.rb
@@ -1,6 +1,7 @@
 module Admin
-  class StatsController < ApplicationController
-    before_filter :verify_organizer
+  class StatsController < Admin::BaseController
+    load_and_authorize_resource
+    load_and_authorize_resource :conference, find_by: :short_title
 
     def index
       @registrations = @conference.registrations.includes(:user)
diff --git a/app/controllers/admin/supporter_levels_controller.rb b/app/controllers/admin/supporter_levels_controller.rb
index bc799c3d..f0721c94 100644
--- a/app/controllers/admin/supporter_levels_controller.rb
+++ b/app/controllers/admin/supporter_levels_controller.rb
@@ -1,6 +1,11 @@
 module Admin
-  class SupporterLevelsController < ApplicationController
-    before_filter :verify_organizer
+  class SupporterLevelsController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    authorize_resource through: :conference
+
+    def index
+      authorize! :update, SupporterLevel.new(conference_id: @conference.id)
+    end
 
     def show
       render :supporter_levels
diff --git a/app/controllers/admin/supporters_controller.rb b/app/controllers/admin/supporters_controller.rb
index 2ee69e6c..f1610631 100644
--- a/app/controllers/admin/supporters_controller.rb
+++ b/app/controllers/admin/supporters_controller.rb
@@ -1,6 +1,7 @@
 module Admin
-  class SupportersController < ApplicationController
-    before_filter :verify_organizer
+  class SupportersController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    load_and_authorize_resource through: :conference
 
     def index
       respond_to do |format|
diff --git a/app/controllers/admin/targets_controller.rb b/app/controllers/admin/targets_controller.rb
index 94562de3..21246185 100644
--- a/app/controllers/admin/targets_controller.rb
+++ b/app/controllers/admin/targets_controller.rb
@@ -1,11 +1,15 @@
 module Admin
-  class TargetsController < ApplicationController
-    before_filter :verify_organizer
+  class TargetsController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    authorize_resource through: :conference
 
     def index
+      authorize! :index, Target.new(conference_id: @conference.id)
     end
 
     def update
+      authorize! :update, @conference => Target
+
       if @conference.update_attributes(params[:conference])
         redirect_to(admin_conference_targets_path(
                     conference_id: @conference.short_title),
diff --git a/app/controllers/admin/tracks_controller.rb b/app/controllers/admin/tracks_controller.rb
index 284d7165..089afacc 100644
--- a/app/controllers/admin/tracks_controller.rb
+++ b/app/controllers/admin/tracks_controller.rb
@@ -1,6 +1,11 @@
 module Admin
-  class TracksController < ApplicationController
-    before_filter :verify_organizer
+  class TracksController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    authorize_resource through: :conference
+
+    def index
+      authorize! :index, Track.new(conference_id: @conference.id)
+    end
 
     def show
       respond_to do |format|
diff --git a/app/controllers/admin/users_controller.rb b/app/controllers/admin/users_controller.rb
index cbd8300d..d5a52787 100644
--- a/app/controllers/admin/users_controller.rb
+++ b/app/controllers/admin/users_controller.rb
@@ -1,6 +1,7 @@
 module Admin
-  class UsersController < ApplicationController
-    before_filter :verify_admin
+  class UsersController < Admin::BaseController
+    load_and_authorize_resource
+
     def new
       @user = User.new
     end
@@ -10,32 +11,25 @@ module Admin
     end
 
     def show
-      @user = User.find(params[:id])
-
       # Variable @show_attributes holds the attributes that are visible for the 'show' action
       # If you want to change the attributes that are shown in the 'show' action of users
       # add/remove the attributes in the following string array
-      @show_attributes = %w(name email affiliation biography registered attended created_at
+      @show_attributes = %w(name email affiliation biography registered attended roles created_at
                             updated_at sign_in_count current_sign_in_at last_sign_in_at
                             current_sign_in_ip last_sign_in_ip)
     end
 
     def update
-      user = User.find(params[:id])
-      user.update_attributes!(params[:user])
-      redirect_to admin_users_path, notice: "Updated #{user.email}"
+      if @user.update_attributes(params[:user])
+        redirect_to admin_users_path, notice: "Updated #{@user.name} (#{@user.email})!"
+      else
+        redirect_to admin_users_path, alert: "Could not update #{@user.name} (#{@user.email}). #{@user.errors.full_messages.join('. ')}."
+      end
     end
 
-    def edit
-      @user = User.find(params[:id])
-    end
-
-    def delete
-      @user = User.find(params[:id])
-    end
+    def edit; end
 
     def destroy
-      @user = User.find(params[:id])
       @user.destroy
       redirect_to admin_users_path, notice: 'User got deleted'
     end
diff --git a/app/controllers/admin/venue_controller.rb b/app/controllers/admin/venue_controller.rb
index 59379a09..f2d77495 100644
--- a/app/controllers/admin/venue_controller.rb
+++ b/app/controllers/admin/venue_controller.rb
@@ -1,9 +1,9 @@
 module Admin
-  class VenueController < ApplicationController
-    before_filter :verify_organizer
+  class VenueController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+    load_and_authorize_resource :venue, through: :conference, singleton: true
 
-    def index
-    end
+    def index; end
 
     def update
       @venue = @conference.venue
diff --git a/app/controllers/admin/volunteers_controller.rb b/app/controllers/admin/volunteers_controller.rb
index 5713845f..e6c53e6e 100644
--- a/app/controllers/admin/volunteers_controller.rb
+++ b/app/controllers/admin/volunteers_controller.rb
@@ -1,26 +1,36 @@
 module Admin
-  class VolunteersController < ApplicationController
+  class VolunteersController < Admin::BaseController
+    load_and_authorize_resource :conference, find_by: :short_title
+
     def index
-      @conference = Conference.find_by(short_title: params[:conference_id])
-      render :index
+      if can_manage_volunteers(@conference)
+        render :index
+      else
+        authorize! :index, :volunteer
+      end
     end
 
     def show
-      @conference = Conference.find_by(short_title: params[:conference_id])
-      if @conference.use_vpositions
-        @volunteers = @conference.registrations.joins(:vchoices).uniq
+      if can_manage_volunteers(@conference)
+        if @conference.use_vpositions
+          @volunteers = @conference.registrations.joins(:vchoices).uniq
+        else
+          @volunteers = @conference.registrations.where(volunteer: true)
+        end
       else
-        @volunteers = @conference.registrations.where(volunteer: true)
+        authorize! :index, :volunteer
       end
     end
 
     def update
-      @conference = Conference.find_by(short_title: params[:conference_id])
-      begin
-        @conference.update_attributes!(params[:conference])
-        redirect_to(admin_conference_volunteers_info_path(conference_id: params[:conference_id]), notice: "Volunteering options were successfully updated.")
-      rescue => e
-        redirect_to(admin_conference_volunteers_info_path(conference_id: params[:conference_id]), alert: "Volunteering options update failed: #{e.message}")
+      if can_manage_volunteers(@conference)
+        if @conference.update_attributes(params[:conference])
+          redirect_to(admin_conference_volunteers_info_path(conference_id: params[:conference_id]), notice: "Volunteering options were successfully updated.")
+        else
+          redirect_to(admin_conference_volunteers_info_path(conference_id: params[:conference_id]), alert: "Volunteering options update failed: #{@conference.errors.full_messages.join '. '}")
+        end
+      else
+        authorize! :index, :volunteer
       end
     end
   end
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 0219a4ca..1e8d6cd1 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -4,13 +4,15 @@ class ApplicationController < ActionController::Base
   before_filter :get_conferences
   before_filter :store_location
   helper_method :date_string
+  # Ensure every controller authorizes resource or skips authorization (skip_authorization_check)
+  check_authorization unless: :devise_controller?
 
   def store_location
     session[:return_to] = request.fullpath if request.get? && controller_name != "user_sessions" && controller_name != "sessions"
   end
 
   def after_sign_in_path_for(resource)
-    if organizer_or_admin? &&
+    if (can? :view, Conference) &&
       (!session[:return_to] ||
       session[:return_to] &&
       session[:return_to] == root_path)
@@ -39,36 +41,17 @@ class ApplicationController < ActionController::Base
       return false
     end
 
-    @conference = Conference.find_by(short_title: params[:conference_id])
     true
   end
 
-  def organizer_or_admin?
-    has_role?(current_user, 'admin') || has_role?(current_user, 'organizer')
-  end
-
-  def verify_organizer
-    if !verify_user
-      return
-    end
-
-    ## Todo simplify this
-    redirect_to root_path unless has_role?(current_user, 'admin') || has_role?(current_user, 'organizer')
-  end
-
-  def verify_admin
-    if !verify_user
-      return
-    end
-
-    redirect_to root_path unless has_role?(current_user, 'admin')
+  def current_ability
+    @current_ability ||= Ability.new(current_user)
   end
 
   rescue_from CanCan::AccessDenied do |exception|
     Rails.logger.debug("Access denied!")
     redirect_to root_path, alert: exception.message
   end
-  helper_method :organizer_or_admin?
 
   def not_found
     raise ActionController::RoutingError.new('Not Found')
diff --git a/app/controllers/commercials_controller.rb b/app/controllers/commercials_controller.rb
index fd9d6d88..79a87f30 100644
--- a/app/controllers/commercials_controller.rb
+++ b/app/controllers/commercials_controller.rb
@@ -1,17 +1,18 @@
 class CommercialsController < ApplicationController
-  before_action :set_conference
+  load_and_authorize_resource :conference, find_by: :short_title
   before_action :set_event
-  before_action :set_commercial, only: [:edit, :update, :destroy]
+  load_and_authorize_resource through: @event, except: [:new, :create]
 
   def new
     @commercial = @event.commercials.build
+    authorize! :new, @commercial
   end
 
-  def edit
-  end
+  def edit; end
 
   def create
     @commercial = @event.commercials.build(commercial_params)
+    authorize! :create, @commercial
 
     if @commercial.save
       redirect_to edit_conference_proposal_path(conference_id: @conference.short_title, id: @event.id),
@@ -40,14 +41,6 @@ class CommercialsController < ApplicationController
 
   private
 
-  def set_commercial
-    @commercial = @event.commercials.find(params[:id])
-  end
-
-  def set_conference
-    @conference = Conference.find_by(short_title: params[:conference_id])
-  end
-
   def set_event
     @event = @conference.events.find(params[:proposal_id])
   end
diff --git a/app/controllers/conference_controller.rb b/app/controllers/conference_controller.rb
index afd35ce6..488ec052 100644
--- a/app/controllers/conference_controller.rb
+++ b/app/controllers/conference_controller.rb
@@ -1,8 +1,7 @@
 class ConferenceController < ApplicationController
-  def show
-    @conference = Conference.find_by_short_title(params[:id])
-    redirect_to root_path, notice: "Conference not ready yet!!" unless @conference.make_conference_public?
-  end
+  load_and_authorize_resource find_by: :short_title
+
+  def show; end
 
   def subscribe
     conference = Conference.find_by_short_title(params[:id])
@@ -41,7 +40,7 @@ class ConferenceController < ApplicationController
   end
 
   def gallery_photos
-    @photos = Conference.find_by_short_title(params[:id]).photos
+    @photos = @conference.photos
     render "photos", formats: [:js]
   end
 end
diff --git a/app/controllers/conference_registration_controller.rb b/app/controllers/conference_registration_controller.rb
index ee4bc677..bfcc2e83 100644
--- a/app/controllers/conference_registration_controller.rb
+++ b/app/controllers/conference_registration_controller.rb
@@ -1,9 +1,9 @@
 class ConferenceRegistrationController < ApplicationController
   before_filter :verify_user
+  load_resource :conference, find_by: :short_title
+  authorize_resource :conference_registration, class: Registration
 
   def register
-    # TODO Figure out how to change the route's id from :id to :conference_id
-    @conference = Conference.find_by(short_title: params[:id])
     @workshops = @conference.events.where('require_registration = ? AND state LIKE ?',
                                           true, 'confirmed')
     @user = current_user
@@ -23,9 +23,8 @@ class ConferenceRegistrationController < ApplicationController
 
   # TODO this is ugly
   def update
-    conference = Conference.find_by(short_title: params[:id])
     user = current_user
-    registration = user.registrations.where(conference_id: conference.id).first
+    registration = user.registrations.where(conference_id: @conference.id).first
     update_registration = true
     # First verify that the supporter code is legit
     if !params[:registration][:supporter_registration_attributes].nil? &&
@@ -35,7 +34,7 @@ class ConferenceRegistrationController < ApplicationController
 
       if regs.count != 0
         if regs.where(email: user.email).count == 0
-          redirect_to(register_conference_path(id: conference.short_title),
+          redirect_to(conference_register_path(conference_id: @conference.short_title),
                       alert: "This code is already in use.
                                  Please contact #{conference.contact.email} for assistance.")
           return
@@ -50,7 +49,7 @@ class ConferenceRegistrationController < ApplicationController
         supporter_reg = params[:registration][:supporter_registration_attributes]
         params[:registration].delete :supporter_registration_attributes
         registration = user.registrations.new(registration_params)
-        if conference.use_supporter_levels? && !supporter_reg.nil?
+        if @conference.use_supporter_levels? && !supporter_reg.nil?
           if !supporter_reg[:id].blank?
             # Means that their supporter registration was entered ahead of time, by an admin
             registration.supporter_registration = SupporterRegistration.find(supporter_reg[:id])
@@ -58,15 +57,15 @@ class ConferenceRegistrationController < ApplicationController
               raise 'Invalid code'
             end
           else
-            registration.supporter_registration = conference.
+            registration.supporter_registration = @conference.
                 supporter_registrations.new(registration_params[:supporter_registration_attributes])
           end
         end
 
-        registration.conference_id = conference.id
+        registration.conference_id = @conference.id
         registration.save!
-        if user.subscriptions.where(conference: conference).blank?
-          subscription = Subscription.new(conference_id: conference.id, user_id: user.id)
+        if user.subscriptions.where(conference: @conference).blank?
+          subscription = Subscription.new(conference_id: @conference.id, user_id: user.id)
           redirect_message = subscription.save ? 'You are now Registered and will be receiving Email Notifications.' : 'You are now Registered.'
         end
       else
@@ -74,7 +73,7 @@ class ConferenceRegistrationController < ApplicationController
       end
     rescue => e
       Rails.logger.debug e.backtrace.join('\n')
-      redirect_to(register_conference_path(id: conference.short_title),
+      redirect_to(conference_register_path(conference_id: @conference.short_title),
                   alert: 'Registration failed:' + e.message)
       return
     end
@@ -84,19 +83,18 @@ class ConferenceRegistrationController < ApplicationController
     else
       # Track ahoy event
       ahoy.track 'Registered', title: 'New registration'
-      if conference.email_settings.send_on_registration?
-        Mailbot.delay.registration_mail(conference, current_user)
+      if @conference.email_settings.send_on_registration?
+        Mailbot.delay.registration_mail(@conference, current_user)
       end
     end
-    redirect_to(register_conference_path(id: conference.short_title),
+    redirect_to(conference_register_path(conference_id: @conference.short_title),
                 notice: redirect_message)
   end
 
   def unregister
-    conference = Conference.find_by(short_title: params[:id])
     user = current_user
-    registration = user.registrations.where(conference_id: conference.id).first
-    subscription = user.subscriptions.where(conference: conference)
+    registration = user.registrations.where(conference_id: @conference.id).first
+    subscription = user.subscriptions.where(conference: @conference)
     unless subscription.blank?
       subscription.first.destroy
     end
diff --git a/app/controllers/event_attachments_controller.rb b/app/controllers/event_attachments_controller.rb
index 9c366eb5..f58e4989 100644
--- a/app/controllers/event_attachments_controller.rb
+++ b/app/controllers/event_attachments_controller.rb
@@ -1,9 +1,11 @@
 class EventAttachmentsController < ApplicationController
+  load_and_authorize_resource :conference, find_by: :short_title
+  load_and_authorize_resource :proposal, class: Event
+  load_and_authorize_resource :upload, class: EventAttachment, through: :proposal
   before_filter :verify_user
   skip_before_filter :verify_user, only: [:show]
 
   def index
-    @proposal = Event.find(params[:proposal_id])
     @uploads = @proposal.event_attachments
     @uploads = @uploads.map{|upload| upload.to_jq_upload }
 
@@ -14,9 +16,8 @@ class EventAttachmentsController < ApplicationController
   end
 
   def show
-    upload = EventAttachment.find(params[:id])
-    if upload.public?
-      send_file upload.attachment.path
+    if @upload.public?
+      send_file @upload.attachment.path
       return
     end
 
@@ -26,7 +27,7 @@ class EventAttachmentsController < ApplicationController
     end
 
     if organizer_or_admin? || current_user == upload.event.submitter
-      send_file upload.attachment.path
+      send_file @upload.attachment.path
     else
       raise ActionController::RoutingError.new('Not Found')
     end
@@ -41,16 +42,14 @@ class EventAttachmentsController < ApplicationController
     end
   end
 
-  def edit
-    @upload = EventAttachment.find(params[:id])
-  end
+  def edit; end
 
   def create
     params[:event_attachment][:title] = params[:title][0]
     params[:event_attachment][:public] = false
     params[:event_attachment][:event_id] = params[:proposal_id]
 
-    if !organizer_or_admin?
+    if cannot? :create, EventAttachment
       begin
         current_user.events.find(params[:proposal_id])
       rescue
@@ -83,9 +82,6 @@ class EventAttachmentsController < ApplicationController
   end
 
   def update
-    @proposal = current_user.events.find(params[:proposal_id])
-    @upload = @proposal.event_attachments.find(params[:proposal_id])
-
     respond_to do |format|
       if @upload.update_attributes(params[:upload])
         format.html { redirect_to @upload, notice: 'Upload was successfully updated.' }
@@ -98,14 +94,12 @@ class EventAttachmentsController < ApplicationController
   end
 
   def destroy
-    @proposal = Event.find(params[:proposal_id])
-    
-    if organizer_or_admin? || current_user == @proposal.submitter
+    if can? :destroy, @proposal
       @upload = @proposal.event_attachments.find(params[:id])
     end
-    
+
     @upload.destroy if !@upload.nil?
-    
+
     respond_to do |format|
 
       format.html { redirect_back_or_to conference_proposal_index_path(@conference.short_title), notice: "Deleted successfully attachment '#{@upload.title}' for proposal '#{@proposal.title}'" }
diff --git a/app/controllers/home_controller.rb b/app/controllers/home_controller.rb
index 1b6a0373..8da4883f 100644
--- a/app/controllers/home_controller.rb
+++ b/app/controllers/home_controller.rb
@@ -1,5 +1,6 @@
 class HomeController < ApplicationController
   before_filter :respond_to_options
+  skip_authorization_check
 
   def index
     @today = Date.current
diff --git a/app/controllers/proposal_controller.rb b/app/controllers/proposal_controller.rb
index dd2bf657..31c8299b 100644
--- a/app/controllers/proposal_controller.rb
+++ b/app/controllers/proposal_controller.rb
@@ -1,22 +1,19 @@
 class ProposalController < ApplicationController
   before_filter :verify_user, except: [:show]
-  before_action :set_conference, only: [:show]
-  before_action :set_event, only: [:show, :edit, :update, :destroy, :confirm, :restart]
+  load_resource :conference, find_by: :short_title
+  load_and_authorize_resource :event, parent: false, through: :conference
 
   def index
     @events = current_user.proposals(@conference)
   end
 
   def show
-    authorize! :show, @event
     # FIXME: We should show more than the first speaker
     @speaker = @event.speakers.first || @event.submitter
   end
 
   def new
-    authorize! :new, Event
     @url = conference_proposal_index_path(@conference.short_title)
-    @event = Event.new
   end
 
   def edit
@@ -26,7 +23,6 @@ class ProposalController < ApplicationController
   end
 
   def create
-    authorize! :create, Event
     @url = conference_proposal_index_path(@conference.short_title)
 
     params[:event].delete :user
@@ -53,7 +49,7 @@ class ProposalController < ApplicationController
     registration = current_user.registrations.where(conference_id: @conference.id).first
     ahoy.track 'Event submission', title: 'New submission'
     if registration.nil?
-      redirect_to(register_conference_path(@conference.short_title),
+      redirect_to(conference_register_path(@conference.short_title),
                   alert: 'Event was successfully submitted.
                  You should register for the conference now.')
     else
@@ -120,7 +116,7 @@ class ProposalController < ApplicationController
     end
 
     if !@conference.user_registered?(current_user)
-      redirect_to(register_conference_path(@conference.short_title),
+      redirect_to(conference_register_path(@conference.short_title),
                   alert: 'The proposal was confirmed. Please register to attend the conference.')
       return
     end
@@ -131,7 +127,7 @@ class ProposalController < ApplicationController
   def restart
     authorize! :update, @event
     @url = conference_proposal_path(@conference.short_title, params[:id])
-    
+
     begin
       @event.restart
     rescue Transitions::InvalidTransition
@@ -149,14 +145,4 @@ class ProposalController < ApplicationController
     redirect_to(conference_proposal_index_path(conference_id: @conference.short_title),
                 notice: "The proposal was re-submitted. The #{@conference.short_title} organizers will review it again.")
   end
-
-  private
-
-  def set_conference
-    @conference = Conference.find_by(short_title: params[:conference_id])
-  end
-
-  def set_event
-    @event = Event.find(params[:id])
-  end
 end
diff --git a/app/controllers/schedule_controller.rb b/app/controllers/schedule_controller.rb
index 84a861b8..e9d60d1a 100644
--- a/app/controllers/schedule_controller.rb
+++ b/app/controllers/schedule_controller.rb
@@ -1,6 +1,7 @@
 class ScheduleController < ApplicationController
+  authorize_resource class: false
   layout "application"
-  
+
   def index
     @conference = Conference.includes(:rooms, events: [:speakers, :track, :event_type]).where("conferences.short_title" => params[:conference_id]).first
     @rooms = @conference.rooms
diff --git a/app/controllers/users/omniauth_callbacks_controller.rb b/app/controllers/users/omniauth_callbacks_controller.rb
index aca14642..4412a8ae 100644
--- a/app/controllers/users/omniauth_callbacks_controller.rb
+++ b/app/controllers/users/omniauth_callbacks_controller.rb
@@ -1,6 +1,7 @@
 module Users
   class OmniauthCallbacksController < Devise::OmniauthCallbacksController
     skip_before_filter :verify_authenticity_token
+    skip_authorization_check
 
     User.omniauth_providers.each do |provider|
       define_method(provider) { handle(provider) }
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 44deebd4..caa1e560 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -137,14 +137,6 @@ module ApplicationHelper
     render "shared/dynamic_association", association_name: association_name, title: title, f: form_builder, hint: options[:hint]
   end
 
-  def has_role?(current_user, role)
-    if current_user.nil?
-      return false
-    end
-
-    return !!current_user.role?(role.to_s.camelize)
-  end
-
   # Same as redirect_to(:back) if there is a valid HTTP referer, otherwise redirect_to()
   def redirect_back_or_to(options = {}, response_status = {})
     if request.env["HTTP_REFERER"]
@@ -204,4 +196,19 @@ module ApplicationHelper
     end
     return providers
   end
+
+  # Receives a hash, generated from User model, function get_roles
+  # Outputs the roles of a user, including the conferences for which the user has the roles
+  # Eg. organizer(oSC13, oSC14), cfp(oSC12, oSC13)
+  def show_roles(roles)
+    roles.map { |x| x[0].titleize + ' ' + x[1] }.join ', '
+  end
+
+  def can_manage_volunteers(conference)
+    if (current_user.has_role? :organizer, conference) || (current_user.has_role? :volunteer_coordinator, conference)
+      true
+    else
+      false
+    end
+  end
 end
diff --git a/app/models/ability.rb b/app/models/ability.rb
index 8c09734e..a7fb93e6 100644
--- a/app/models/ability.rb
+++ b/app/models/ability.rb
@@ -2,16 +2,147 @@ class Ability
   include CanCan::Ability
 
   def initialize(user)
-    # guest user (not logged in)
-    user ||= User.new
-    if user.admin? || user.organizer?
-      # An admin can manage everything
-      can :manage, :all
+    # The first argument to `can` is the action you are giving the user permission to do.
+    # If you pass :manage it will apply to every action. Other common actions here are
+    # :read, :create, :update and :destroy.
+    #
+    # The second argument is the resource the user can perform the action on. If you pass
+    # :all it will apply to every resource. Otherwise pass a Ruby class of the resource.
+    #
+    # The third argument is an optional hash of conditions to further filter the objects.
+    # For example, here the user can only update published articles.
+    #
+    #   can :update, Article, :published => true
+    #
+    # See the wiki for details: https://github.com/ryanb/cancan/wiki/Defining-Abilities
+
+    # Order Abilities
+    # (Check https://github.com/CanCanCommunity/cancancan/wiki/Ability-Precedence)
+    # Check roles of user, using rolify. Role name is *case sensitive*
+    # user.is_organizer? or user.has_role? :organizer
+    # user.is_cfp_of? Conference or user.has_role? :cfp, Conference
+    # user.is_info_desk_of? Conference
+    # user.is_volunteer_coordinator_of? Conference
+    # user.is_attendee_of? Conference
+    # The following is wrong because a user will only have 'cfp' role for a specific conference
+    # user.is_cfp? # This is always false
+
+    user ||= User.new # guest user (not logged in)
+
+    if user.new_record?
+      guest
     else
-      can [:update, :destroy], Event do |event|
-        event.users.include?(user)
+      roles = Role::ACTIONABLES.map {|i| i.parameterize.underscore}
+      if (user.roles.pluck(:name) & roles).empty? && !user.is_admin # User has no roles
+        signed_in(user)
+      else
+        user_with_roles(user)
       end
-      can [:create, :read], Event
     end
   end
+
+  def user_with_roles(user)
+    conf_ids_for_organizer = []
+    venue_ids_for_organizer = []
+    conf_ids_for_cfp = []
+    venue_ids_for_cfp = []
+    conf_ids_for_info_desk = []
+    conf_ids_for_volunteer_coordinator = []
+
+    # Ids of all the conferences for which the user has an 'organizer' role
+    conf_ids_for_organizer =
+        Conference.with_role(:organizer, user).pluck(:id) if user.has_role? :organizer, :any
+    venue_ids_for_organizer =
+        Conference.with_role(:organizer, user).pluck(:venue_id) if user.has_role? :organizer, :any
+    conf_ids_for_cfp =
+      Conference.with_role(:cfp, user).pluck(:id) if user.has_role? :cfp, :any
+    venue_ids_for_cfp =
+        Conference.with_role(:cfp, user).pluck(:venue_id) if user.has_role? :cfp, :any
+    # Ids of all the conferences for which the user has an 'info_desk' role
+    conf_ids_for_info_desk =
+        Conference.with_role(:info_desk, user).pluck(:id) if user.has_role? :info_desk, :any
+    # Ids of all the conferences for which the user has a 'volunteer_coordinator' role
+    conf_ids_for_volunteer_coordinator =
+        Conference.with_role(:volunteer_coordinator, user).pluck(:id) if user.has_role? :volunteer_coordinator, :any
+
+    signed_in(user) # Inherit abilities from signed user
+    # User with role
+    can :manage, User if user.is_admin # ??? || (user.has_role? :organizer, :any)
+    can [:new, :create], Conference if user.is_admin || (user.has_role? :organizer, :any)
+    can [:index, :show, :gallery_photos], Conference
+    can :manage, Conference, id: conf_ids_for_organizer
+#     can :manage, Conference do |conference|
+#       conference.id = conf_ids_for_organizer
+#     end
+    can :manage, Venue, id: venue_ids_for_organizer
+    can :index, Venue, id: venue_ids_for_cfp
+    can :manage, Registration, conference_id: conf_ids_for_organizer + conf_ids_for_info_desk
+    can :manage, Question, conference_id: conf_ids_for_organizer + conf_ids_for_info_desk
+    cannot [:edit, :update, :destroy], Question, global: true
+    can :manage, Vposition, conference_id: conf_ids_for_organizer + conf_ids_for_volunteer_coordinator
+    can :manage, Vday, conference_id: conf_ids_for_organizer + conf_ids_for_volunteer_coordinator
+    # The ability to manage an Event means that:
+    # the user can also edit the schedule and that
+    # the user can also vote
+    can :manage, Event, conference_id: conf_ids_for_organizer + conf_ids_for_cfp
+    can :create, Event
+    can :manage, CallForPapers, conference_id: conf_ids_for_organizer + conf_ids_for_cfp
+    can :manage, EventType, conference_id: conf_ids_for_organizer + conf_ids_for_cfp
+    can :manage, Track, conference_id: conf_ids_for_organizer + conf_ids_for_cfp
+    can :manage, DifficultyLevel, conference_id: conf_ids_for_organizer + conf_ids_for_cfp
+    can :manage, EmailSettings, conference_id: conf_ids_for_organizer + conf_ids_for_cfp
+    can :manage, Campaign, conference_id: conf_ids_for_organizer
+    can :manage, Lodging, venue_id: venue_ids_for_organizer
+    can :manage, Photo, conference_id: conf_ids_for_organizer
+    can :manage, Room, conference_id: conf_ids_for_organizer + conf_ids_for_cfp
+    can :manage, Sponsor, conference_id: conf_ids_for_organizer
+    can :manage, SponsorshipLevel, conference_id: conf_ids_for_organizer
+    can :manage, SupporterLevel, conference_id: conf_ids_for_organizer
+    can :manage, Target, conference_id: conf_ids_for_organizer
+    can :index, Commercial, commercialable_type: 'Conference'
+    can :manage, Commercial, commercialable_type: 'Conference', commercialable_id: conf_ids_for_organizer
+    # Manage commercials for events that belong to a conference of which user is organizer
+    can :manage, Commercial, commercialable_type: 'Event', commercialable_id: Event.where(conference_id: conf_ids_for_organizer + conf_ids_for_cfp).pluck(:id)
+    can :manage, Contact, conference_id: conf_ids_for_organizer
+    can :manage, Campaign, conference_id: conf_ids_for_organizer
+    can :manage, Photo, conference_id: conf_ids_for_organizer
+  end
+
+  def guest
+    ## Abilities for everyone, even guests (not logged in users)
+    can [:show, :gallery_photos], Conference do |conference|
+      conference.make_conference_public == true
+    end
+
+    # see commercials too
+
+    can :show, Event do |event|
+      event.state == 'confirmed'
+    end
+
+    can :index, :schedule # show?
+  end
+
+  def signed_in(user)
+    guest # Inherits abilities of guest
+
+    # Conference Registration
+    can :manage, Registration, user_id: user.id
+
+    ## Proposals
+    # Users can manage their own proposals
+    can :manage, Event, id: user.events.pluck(:id)
+
+    # Submit proposals only for conferences that are not over yet
+    can :create, Event, conference_id: Conference.where('end_date >= ?', Date.today).pluck(:id)
+    # Users can manage their own commercials
+    can :manage, Commercial, commercialable_type: 'Event', commercialable_id: user.events.pluck(:id)
+    # View commercials of confirmed events
+    can :show, Commercial, commercialable_type: 'Event', commercialable_id: Event.where(state: 'confirmed').pluck(:id)
+
+    can :manage, EventAttachment do |ea|
+      Event.find(ea.event_id).event_users.where(user_id: user.id).present?
+    end
+    can :create, EventAttachment
+  end
 end
diff --git a/app/models/call_for_papers.rb b/app/models/call_for_papers.rb
index 569939c3..7876efa2 100644
--- a/app/models/call_for_papers.rb
+++ b/app/models/call_for_papers.rb
@@ -1,7 +1,7 @@
 class CallForPapers < ActiveRecord::Base
   attr_accessible :start_date, :end_date,
                   :description, :schedule_changes, :rating,
-                  :schedule_public, :include_cfp_in_splash
+                  :schedule_public, :include_cfp_in_splash, :conference_id
   belongs_to :conference
 
   validates_presence_of :start_date, :end_date
diff --git a/app/models/campaign.rb b/app/models/campaign.rb
index 0228406b..77ff94f2 100644
--- a/app/models/campaign.rb
+++ b/app/models/campaign.rb
@@ -1,6 +1,6 @@
 class Campaign < ActiveRecord::Base
   attr_accessible :name, :utm_source, :utm_medium, :utm_term,
-                  :utm_content, :utm_campaign, :target_ids
+                  :utm_content, :utm_campaign, :target_ids, :conference_id
 
   validates :name, :utm_campaign, presence: true
 
diff --git a/app/models/conference.rb b/app/models/conference.rb
index 01a8d8b4..552d5248 100644
--- a/app/models/conference.rb
+++ b/app/models/conference.rb
@@ -4,6 +4,7 @@
 class Conference < ActiveRecord::Base
   require 'uri'
   serialize :events_per_week, Hash
+  resourcify # Needed to call 'Conference.with_role' in /models/ability.rb
 
   attr_accessible :title, :short_title, :timezone, :html_export_path,
                   :start_date, :end_date, :rooms_attributes, :tracks_attributes,
diff --git a/app/models/difficulty_level.rb b/app/models/difficulty_level.rb
index ac8306ae..b230c07f 100644
--- a/app/models/difficulty_level.rb
+++ b/app/models/difficulty_level.rb
@@ -1,6 +1,6 @@
 class DifficultyLevel < ActiveRecord::Base
-  attr_accessible :title, :description, :color
-  
+  attr_accessible :title, :description, :color, :conference_id
+
   belongs_to :conference
   has_many :events
 
diff --git a/app/models/event_type.rb b/app/models/event_type.rb
index 81db86da..a2204985 100644
--- a/app/models/event_type.rb
+++ b/app/models/event_type.rb
@@ -1,10 +1,11 @@
 class EventType < ActiveRecord::Base
-  attr_accessible :title, :length, :minimum_abstract_length, :maximum_abstract_length, :color
+  attr_accessible :title, :length, :minimum_abstract_length, :maximum_abstract_length, :color,
+                  :conference_id
 
   belongs_to :conference
 
   validates :title, presence: true
-  validates :length, numericality: {greater_than: 0} 
+  validates :length, numericality: {greater_than: 0}
   validates :minimum_abstract_length, presence: true
   validates :maximum_abstract_length, presence: true
 
diff --git a/app/models/lodging.rb b/app/models/lodging.rb
index 296ff0b1..9871f35c 100644
--- a/app/models/lodging.rb
+++ b/app/models/lodging.rb
@@ -1,5 +1,5 @@
 class Lodging < ActiveRecord::Base
-  attr_accessible :name, :description, :photo, :website_link
+  attr_accessible :name, :description, :photo, :website_link, :venue_id
   belongs_to :venue
   has_attached_file :photo,
                     styles: { thumb: '100x100>', large: '300x300>' }
diff --git a/app/models/question.rb b/app/models/question.rb
index 1a6302c1..96a5b8db 100644
--- a/app/models/question.rb
+++ b/app/models/question.rb
@@ -1,14 +1,14 @@
 class Question < ActiveRecord::Base
-  attr_accessible :title, :global, :answers_attributes, :answer_ids, :question_type_id
-  
+  attr_accessible :title, :global, :answers_attributes, :answer_ids, :question_type_id, :conference_id
+
   belongs_to :question_type
   has_and_belongs_to_many :conferences
-  
+
   has_many :qanswers, dependent: :delete_all
   has_many :answers, through: :qanswers, dependent: :delete_all
-  
+
   validates :title, presence: true
   validates :answers, presence: true
-  
+
   accepts_nested_attributes_for :answers, allow_destroy: true
 end
diff --git a/app/models/role.rb b/app/models/role.rb
index e6d7cb0a..fc2f1e50 100644
--- a/app/models/role.rb
+++ b/app/models/role.rb
@@ -1,4 +1,10 @@
 class Role < ActiveRecord::Base
-  attr_accessible :name
+  attr_accessible :name, :description
   has_and_belongs_to_many :users
+  belongs_to :resource, polymorphic: true
+
+  scopify
+
+  LABELS = ['Attendee', 'Volunteer', 'Speaker', 'Sponsor', 'Press', 'Keynote Speaker']
+  ACTIONABLES = ['Organizer', 'CfP', 'Info Desk', 'Volunteers Coordinator']
 end
diff --git a/app/models/room.rb b/app/models/room.rb
index f4611a7d..3244ff54 100644
--- a/app/models/room.rb
+++ b/app/models/room.rb
@@ -1,5 +1,5 @@
 class Room < ActiveRecord::Base
-  attr_accessible :name, :size, :public
+  attr_accessible :name, :size, :public, :conference_id
 
   belongs_to :conference
   has_many :events
diff --git a/app/models/sponsor.rb b/app/models/sponsor.rb
index 93244c0e..e6acad75 100644
--- a/app/models/sponsor.rb
+++ b/app/models/sponsor.rb
@@ -1,6 +1,5 @@
 class Sponsor < ActiveRecord::Base
-  attr_accessible :name, :description, :website_url, :logo,
-                  :sponsorship_level_id
+  attr_accessible :name, :description, :website_url, :logo, :sponsorship_level_id, :conference_id
   belongs_to :sponsorship_level
   belongs_to :conference
   has_attached_file :logo,
diff --git a/app/models/sponsorship_level.rb b/app/models/sponsorship_level.rb
index 4cbe3a7c..174a440d 100644
--- a/app/models/sponsorship_level.rb
+++ b/app/models/sponsorship_level.rb
@@ -1,5 +1,5 @@
 class SponsorshipLevel < ActiveRecord::Base
-  attr_accessible :title
+  attr_accessible :title, :conference_id
   validates_presence_of :title
   belongs_to :conference
   has_many :sponsors
diff --git a/app/models/supporter_level.rb b/app/models/supporter_level.rb
index 02c56f61..deb12aa8 100644
--- a/app/models/supporter_level.rb
+++ b/app/models/supporter_level.rb
@@ -2,5 +2,5 @@ class SupporterLevel < ActiveRecord::Base
   belongs_to :conference
   has_many :supporter_registrations
 
-  attr_accessible :conference, :title, :url, :description, :ticket_price
+  attr_accessible :conference, :title, :url, :description, :ticket_price, :conference_id
 end
diff --git a/app/models/target.rb b/app/models/target.rb
index 6a7990a8..8c994522 100644
--- a/app/models/target.rb
+++ b/app/models/target.rb
@@ -1,7 +1,7 @@
 class Target < ActiveRecord::Base
   include ActionView::Helpers::TextHelper
 
-  attr_accessible :due_date, :target_count, :unit
+  attr_accessible :due_date, :target_count, :unit, :conference_id
 
   default_scope { order('due_date ASC') }
 
diff --git a/app/models/track.rb b/app/models/track.rb
index beb033c9..4e7deba7 100644
--- a/app/models/track.rb
+++ b/app/models/track.rb
@@ -1,5 +1,5 @@
 class Track < ActiveRecord::Base
-  attr_accessible :name, :description, :color
+  attr_accessible :name, :description, :color, :conference_id
 
   belongs_to :conference
 
diff --git a/app/models/user.rb b/app/models/user.rb
index 498cb68c..77a38301 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,7 +1,10 @@
 class User < ActiveRecord::Base
+  rolify
   include Gravtastic
   gravtastic size: 32
 
+  before_create :setup_role
+
   # Include default devise modules. Others available are:
   # :token_authenticatable, :confirmable,
   # :lockable, :timeoutable and :omniauthable
@@ -13,7 +16,7 @@ class User < ActiveRecord::Base
   has_many :openids
 
   attr_accessible :email, :password, :password_confirmation, :remember_me, :role_id, :role_ids,
-                  :name, :email_public, :biography, :nickname, :affiliation
+                  :name, :email_public, :biography, :nickname, :affiliation, :is_admin
 
   has_many :event_users, dependent: :destroy
   has_many :events, -> { uniq }, through: :event_users
@@ -23,8 +26,6 @@ class User < ActiveRecord::Base
   has_many :subscriptions, dependent: :destroy
   accepts_nested_attributes_for :roles
 
-  before_create :setup_role
-
   validates :name, presence: true
 
   # Searches for user based on email. Returns found user or new user.
@@ -47,26 +48,20 @@ class User < ActiveRecord::Base
     user
   end
 
-  def role?(role)
-    Rails.logger.debug('Checking role in user')
-    !!roles.find_by_name(role.to_s.downcase.camelize)
-  end
-
-  def admin?
-    role?('Admin')
-  end
-
-  def organizer?
-    role?('Organizer')
-  end
-
-  def get_roles
-    roles
-  end
-
   def setup_role
-    roles << Role.where(name: 'Admin') if User.count == 0
-    roles << Role.where(name: 'Participant') if roles.empty?
+    self.is_admin = true if User.count == 0
+  end
+
+  # Gets the roles of the user, groups them by role.name and returns the resource(s) of each role
+  # ====Returns
+  # * +Hash+ * ->  e.g. 'organizer' =>  "(conf1, conf2)"
+  def get_roles
+    result = {}
+    Role::ACTIONABLES.each do |role|
+      resources = self.roles.where(name: role.parameterize.underscore).map{ |myrole| Conference.find(myrole.resource_id).short_title }.join ', '
+      result[role.parameterize.underscore] = "(#{ resources })" unless resources.blank?
+    end
+    result
   end
 
   def self.prepare(params)
diff --git a/app/views/admin/commercials/index.html.haml b/app/views/admin/commercials/index.html.haml
index 002398b1..e8f72d53 100644
--- a/app/views/admin/commercials/index.html.haml
+++ b/app/views/admin/commercials/index.html.haml
@@ -14,8 +14,11 @@
             = commercial.commercial_type
           .flexvideo
             = render partial: 'shared/media_item', locals: { commercial_type: commercial.commercial_type, commercial_id: commercial.commercial_id }
-          = link_to 'Edit', edit_admin_conference_commercial_path(@conference.short_title, commercial.id), class: 'btn btn-primary'
-          = link_to 'Delete', admin_conference_commercial_path(@conference.short_title, commercial.id),
-            method: :delete, data: { confirm: 'Are you sure?' }, class: 'btn btn-danger'
-%br
+          - if can? :update, commercial
+            = link_to 'Edit', edit_admin_conference_commercial_path(@conference.short_title, commercial.id), class: 'btn btn-primary'
+          - if can? :destroy, commercial
+            = link_to 'Delete', admin_conference_commercial_path(@conference.short_title, commercial.id),
+              method: :delete, data: { confirm: 'Are you sure?' }, class: 'btn btn-danger'
+- if can? :create, @conference.commercials.new
+  %br
   = link_to 'New Commercial', new_admin_conference_commercial_path, class: 'btn btn-primary'
diff --git a/app/views/admin/conference/_roles.html.haml b/app/views/admin/conference/_roles.html.haml
new file mode 100644
index 00000000..54235af3
--- /dev/null
+++ b/app/views/admin/conference/_roles.html.haml
@@ -0,0 +1,29 @@
+#myroles.roles
+  - unless @role.blank?
+    %p.text-muted
+      = @role.first.description
+
+  %hr
+  .row
+    .col-md-6
+      = semantic_form_for(:user, url: add_user_admin_conference_path(@conference.short_title, role: @selection), remote: true) do |f|
+        %h4
+          = f.input :email, label: "Add role '#{@selection.humanize.titleize}' to user: ", placeholder: "User's email", input_html: { required: 'required' }
+        = f.action :submit, as: :button, label: 'Add User', button_html: {value: 'Add', class: 'btn btn-primary'}
+  .row
+    .col-md-12
+      %h3 Users with role #{@selection.humanize.titleize}
+      %table.table.table-striped.table-bordered.table-hover
+        %thead
+          %th ID
+          %th Name
+          %th Email
+        %tbody
+          - @role_users[@selection].each do |user|
+            %tr
+              %td
+                = link_to remove_user_admin_conference_path(@conference.short_title, user_id: user.id, role: @selection), method: :delete, remote: true, title: 'Remove user' do
+                  %i{class: 'fa fa-times'}
+                = user.id
+                %td= user.name
+                %td= user.email
diff --git a/app/views/admin/conference/_todo_list.html.haml b/app/views/admin/conference/_todo_list.html.haml
index 3f87ecbd..acb0155e 100644
--- a/app/views/admin/conference/_todo_list.html.haml
+++ b/app/views/admin/conference/_todo_list.html.haml
@@ -8,25 +8,49 @@
         = conference_progress['process'] + '%'
   %li{'class'=>class_for_todo(conference_progress['registration'])}
     %span{'class'=>icon_for_todo(conference_progress['registration'])}
-    = link_to 'Set up registration period', edit_admin_conference_path(conference_progress['short_title'], :anchor => 'conference-end-datepicker')
+    - if can? :update, @conference.registrations.build
+      = link_to 'Set up registration period', edit_admin_conference_path(conference_progress['short_title'], :anchor => 'conference-end-datepicker')
+    - else
+      Set up registration period
   %li{'class'=>class_for_todo(conference_progress['cfp'])}
     %span{'class'=>icon_for_todo(conference_progress['cfp'])}
-    = link_to 'Set up call for papers', admin_conference_callforpapers_path(conference_progress['short_title'])
+    - if can? :update, CallForPapers.new(conference_id: @conference.id)
+      = link_to 'Set up call for papers', admin_conference_callforpapers_path(conference_progress['short_title'])
+    - else
+      Set up call for papers
   %li{'class'=>class_for_todo(conference_progress['venue'])}
     %span{'class'=>icon_for_todo(conference_progress['venue'])}
-    = link_to 'Add venue', admin_conference_venue_info_path(conference_progress['short_title'])
+    - if can? :update, @conference.venue
+      = link_to 'Add venue', admin_conference_venue_info_path(conference_progress['short_title'])
+    - else
+      Add venue
   %li{'class'=>class_for_todo(conference_progress['rooms'])}
     %span{'class'=>icon_for_todo(conference_progress['rooms'])}
-    = link_to 'Add rooms', admin_conference_rooms_path(conference_progress['short_title'])
+    - if can? :update, @conference.rooms.build
+      = link_to 'Add rooms', admin_conference_rooms_path(conference_progress['short_title'])
+    - else
+      Add rooms
   %li{'class'=>class_for_todo(conference_progress['tracks'])}
     %span{'class'=>icon_for_todo(conference_progress['tracks'])}
-    = link_to 'Add tracks', admin_conference_tracks_path(conference_progress['short_title'])
+    - if can? :update, @conference.tracks.build
+      = link_to 'Add tracks', admin_conference_tracks_path(conference_progress['short_title'])
+    - else
+      Add tracks
   %li{'class'=>class_for_todo(conference_progress['event_types'])}
     %span{'class'=>icon_for_todo(conference_progress['event_types'])}
-    = link_to 'Add event types', admin_conference_eventtypes_path(conference_progress['short_title'])
+    - if can? :update, @conference.event_types.build
+      = link_to 'Add event types', admin_conference_event_types_path(conference_progress['short_title'])
+    - else
+      Add event types
   %li{'class'=>class_for_todo(conference_progress['difficulty_levels'])}
     %span{'class'=>icon_for_todo(conference_progress['difficulty_levels'])}
-    = link_to 'Add difficulty levels', admin_conference_difficulty_levels_path(conference_progress['short_title'])
+    - if can? :update, @conference.difficulty_levels.build
+      = link_to 'Add difficulty levels', admin_conference_difficulty_levels_path(conference_progress['short_title'])
+    - else
+      Add difficulty levels
   %li{class: class_for_todo(conference_progress['make_conference_public'])}
     %span{'class'=>icon_for_todo(conference_progress['make_conference_public'])}
-    = link_to 'Make Splash Page Public for Visitors', edit_admin_conference_path(conference_progress['short_title'])
+    - if can? :update, @conference
+      = link_to 'Make Splash Page Public for Visitors', edit_admin_conference_path(conference_progress['short_title'])
+    - else
+      Make Splash Page Public for Visitors
diff --git a/app/views/admin/conference/roles.html.haml b/app/views/admin/conference/roles.html.haml
new file mode 100644
index 00000000..a49bb17d
--- /dev/null
+++ b/app/views/admin/conference/roles.html.haml
@@ -0,0 +1,22 @@
+.row
+  .col-md-6
+    = semantic_form_for(:user, url: roles_admin_conference_path(@conference.short_title), remote: true) do |f|
+      %h4
+        = f.input :roles, collection: @roles, label: 'Show users for role: '
+
+= render partial: 'roles'
+
+:javascript
+
+  $("#user_roles_input").change(function () {
+
+    var url = document.forms[0].action;
+    var selected_role = $(this).find('option:selected').attr('value');
+
+    $.ajax({
+      url: url,
+      type: "POST",
+      data: {user: { roles: selected_role } },
+      dataType: "script"
+    });
+  });
diff --git a/app/views/admin/conference/roles.js.erb b/app/views/admin/conference/roles.js.erb
new file mode 100644
index 00000000..15ac7237
--- /dev/null
+++ b/app/views/admin/conference/roles.js.erb
@@ -0,0 +1 @@
+$('#myroles').html("<%= escape_javascript(render partial: 'roles').html_safe %>");
diff --git a/app/views/admin/eventtypes/_event_type_fields.html.erb b/app/views/admin/event_types/_event_type_fields.html.erb
similarity index 100%
rename from app/views/admin/eventtypes/_event_type_fields.html.erb
rename to app/views/admin/event_types/_event_type_fields.html.erb
diff --git a/app/views/admin/eventtypes/index.html.haml b/app/views/admin/event_types/index.html.haml
similarity index 76%
rename from app/views/admin/eventtypes/index.html.haml
rename to app/views/admin/event_types/index.html.haml
index ad9256d1..c225bd66 100644
--- a/app/views/admin/eventtypes/index.html.haml
+++ b/app/views/admin/event_types/index.html.haml
@@ -1,5 +1,5 @@
 .row
   .col-md-8
-    = semantic_form_for(@conference, url: admin_conference_eventtypes_path(@conference.short_title, @conference.event_types)) do |f|
+    = semantic_form_for(@conference, url: admin_conference_event_types_path(@conference.short_title, @conference.event_types)) do |f|
       = dynamic_association :event_types, "Event Types", f
       = f.action :submit, :as => :button, :button_html => {:class => "btn btn-primary"}
diff --git a/app/views/admin/questions/_questions.html.haml b/app/views/admin/questions/_questions.html.haml
index 9feda3aa..145261e3 100644
--- a/app/views/admin/questions/_questions.html.haml
+++ b/app/views/admin/questions/_questions.html.haml
@@ -19,10 +19,8 @@
         = label_tag dom_id(q), "Answers: #{q.answers.map {|a| a.title}.join(', ')}"
 
       %td= link_to 'Edit', edit_admin_conference_question_path(@conference.short_title, q),
-                    class: 'btn btn-primary',
-                    disabled: q.global == true && !has_role?(current_user, 'Admin')
+                    class: 'btn btn-primary', disabled: !(can? :update, q)
 
       %td= link_to 'Delete', admin_conference_question_path(@conference.short_title, q),
                     method: :delete, remote: true, class: 'btn btn-danger',
-                    confirm: "Delete question '#{q.title}'?",
-                    disabled: q.global == true && !has_role?(current_user, "Admin")
+                    confirm: "Delete question '#{q.title}'?", disabled: !(can? :destroy, q)
diff --git a/app/views/admin/questions/index.html.haml b/app/views/admin/questions/index.html.haml
index e34e997a..7810ddb7 100644
--- a/app/views/admin/questions/index.html.haml
+++ b/app/views/admin/questions/index.html.haml
@@ -1,16 +1,18 @@
 .row
   .col-md-8
     .pull-right
-      %b= link_to 'Create New Question','#', 'data-toggle' => 'modal',
-                  'data-target' => '#new-question', class: 'btn btn-success'
+      - if can? :create, Question.new(conference_id: @conference.id)
+        %b= link_to 'Create New Question','#', 'data-toggle' => 'modal',
+                    'data-target' => '#new-question', class: 'btn btn-success'
       %br
       %br
     - if @questions.count > 0
       = semantic_form_for(@conference, url: admin_conference_questions_update_conference_path(@conference.short_title)) do |f|
         .questions{id: 'myquestions'}
           = render partial: 'questions'
-        = f.submit "Update Questions for #{@conference.short_title}", class: 'btn btn-primary',
-                    confirm: 'Are you sure you want to make these changes?'
+        - if can? :update, @conference
+          = f.submit "Update Questions for #{@conference.short_title}", class: 'btn btn-primary',
+                      confirm: 'Are you sure you want to make these changes?'
 
     .modal.fade{id: 'new-question', 'role' => 'dialog', 'aria-hidden' => 'true'}
       .modal-dialog
diff --git a/app/views/admin/registrations/index.html.haml b/app/views/admin/registrations/index.html.haml
index 78aa4db7..a0590a59 100644
--- a/app/views/admin/registrations/index.html.haml
+++ b/app/views/admin/registrations/index.html.haml
@@ -7,9 +7,11 @@
           = "(#{@registrations.length})"
         = " - Attended (#{@attended})"
         .btn-group.pull-right
-          = link_to "New", new_admin_conference_registration_path(@conference.short_title), :class => "btn btn-default"
-          = link_to "Export PDF", admin_conference_registrations_path(@conference.short_title, :format => :pdf), :class => "btn btn-default"
-          = link_to "Export XLS", {:format => :xlsx}, :class => "btn btn-default"
+          - if can? :create, Registration
+            = link_to "New", new_admin_conference_registration_path(@conference.short_title), :class => "btn btn-default"
+          - if can? :read, Registration
+            = link_to "Export PDF", admin_conference_registrations_path(@conference.short_title, :format => :pdf), :class => "btn btn-default"
+            = link_to "Export XLS", {:format => :xlsx}, :class => "btn btn-default"
     %table.table.table-bordered.table-striped.table-hover#registrations
       %thead
         %th
@@ -21,7 +23,7 @@
         %th
         %th
         %th
-      - counter = 0    
+      - counter = 0
       - @registrations.each do |registration|
         %tr
           %td
@@ -33,7 +35,7 @@
                 - if registration.supporter_level && registration.supporter_level.title != 'Free'
                   %p{:style => "color:red"}
                     = registration.supporter_level.title
-          
+
               -elsif field == 'attended'
                 = link_to "#{registration.send(field.to_sym)}", admin_conference_registrations_change_field_path(@conference.short_title, :id => registration.id, :view_field => "#{field}"), :method => :patch, ":#{field}" => registration.send(field.to_sym), :class => "btn btn-success"
 
@@ -64,11 +66,11 @@
         "bLengthChange": false
       } );
   } );
-  
+
   function toggle(rowid) {
     if( document.getElementById(rowid).style.display=='none' ){
       document.getElementById(rowid).style.display = '';
     }else{
       document.getElementById(rowid).style.display = 'none';
     }
-  };
\ No newline at end of file
+  };
diff --git a/app/views/admin/users/_form.html.haml b/app/views/admin/users/_form.html.haml
index ddd33cf8..e945bad7 100644
--- a/app/views/admin/users/_form.html.haml
+++ b/app/views/admin/users/_form.html.haml
@@ -1,5 +1,6 @@
 = semantic_form_for [:admin, @user] do |f|
-  = f.inputs "Basic Information" do
+  = f.inputs 'Basic Information' do
+    = f.input :is_admin, hint: 'An admin can create a new conference, manage users and make other users admins.'
     = f.input :name, :as => :string
     = f.input :email
     = f.input :affiliation, :as => :string
diff --git a/app/views/admin/users/index.html.haml b/app/views/admin/users/index.html.haml
index d66a475d..6c654b85 100644
--- a/app/views/admin/users/index.html.haml
+++ b/app/views/admin/users/index.html.haml
@@ -5,7 +5,7 @@
       - if @users
         = "(#{@users.length})"
 
-      = link_to "New User", new_admin_user_path, :class => "btn btn-success pull-right"
+      = link_to "New User", new_admin_user_path, class: 'btn btn-success pull-right'
     .well
       %table.table.table-striped.table-bordered.table-hover#users
         %thead
@@ -18,7 +18,7 @@
           %th
             %b Name
           %th
-            %b # of Conference Registrations
+            %b Attended Conferences
           %th
             %b Roles
           %th
@@ -38,39 +38,24 @@
             %td
               = user.name
             %td
-              = user.registrations.count
+              = user.registrations.where(attended: true).count
             %td
-              .modal.fade{:id => "user-role-selection-#{user.id}", "role" => "dialog", "aria-hidden" => "true"}
-                .modal-dialog
-                  .modal-content
-                    .modal-header
-                      %button{"type"=>"button", :class=>"close", "data-dismiss"=>"modal", "aria-hidden"=>"true"}
-                        ×
-                      %h3{:id => "role-selector-header-#{user.id}"}
-                        Modifying Roles
-                    .modal-body
-                      - if current_user == user
-                        You cannot modify your own role!
-                        %br
-                        %button{:class=> "btn btn-danger", "data-dismiss"=> "modal", "aria-hidden"=>"true"}
-                          Cancel
-                      - else
-                        = "Give #{user.name} (#{user.email}) the following roles:"
-                        = semantic_form_for(user, :url => admin_user_path(user), :method => :put) do |f|
-                          = f.input :roles, :label => false
-                          %button{:class=> "btn btn-danger", "data-dismiss"=> "modal", "aria-hidden"=>"true"}
-                            Cancel
-                          = f.action :submit, :as => :button, :button_html => {:value => "Save", :class => "btn btn-primary"}
-              =link_to "#{user.roles.map { |role| role.name }.join ', '}", "#", "data-toggle" => "modal", "data-target" => "#user-role-selection-#{user.id}",id: "user-modify-role-#{user.id}"
-            %td
-              = link_to "Edit", edit_admin_user_path(user)
-            %td
-              = link_to "View", admin_user_path(user)
-            %td
-              - if current_user.id == user.id or user.role_ids.include? 3
-                =link_to 'Delete',admin_user_path(user), :method => :delete , :data => {:confirm => 'Are you sure ?'}, :disabled => true,:class => "btn btn-primary disabled btn-danger",:role => "button"
-              - else
-                =link_to 'Delete',admin_user_path(user), :method=> :delete , :data=> {:confirm => 'Are you sure ?'},:class => "btn btn-primary btn-danger"
+              - unless user.get_roles.blank?
+                = show_roles(user.get_roles.first(2))
+                - if user.get_roles.count > 2
+                  = '...'
+            - if can? :show, user
+              %td
+                = link_to "View", admin_user_path(user), class: 'btn btn-success'
+            - if can? :update, user
+              %td
+                = link_to "Edit", edit_admin_user_path(user), class: 'btn btn-primary'
+            - if can? :destroy, user
+              %td
+                - if current_user.id == user.id or user.role_ids.include? 3
+                  =link_to 'Delete',admin_user_path(user), :method => :delete , :data => {:confirm => 'Are you sure ?'}, :disabled => true,:class => "btn btn-primary disabled btn-danger",:role => "button"
+                - else
+                  =link_to 'Delete',admin_user_path(user), :method=> :delete , :data=> {:confirm => 'Are you sure ?'},:class => "btn btn-primary btn-danger"
 
 
 :javascript
diff --git a/app/views/admin/users/show.html.haml b/app/views/admin/users/show.html.haml
index c41a6b3b..161d8708 100644
--- a/app/views/admin/users/show.html.haml
+++ b/app/views/admin/users/show.html.haml
@@ -1,7 +1,14 @@
+- if can? :edit, @user
+  .pull-right
+    = link_to "Edit", edit_admin_user_path(@user), class: 'btn btn-primary'
 %table.table
   - @show_attributes.each do |attr|
     %tr
-      %td
+      %td{class: 'table20'}
         %b
           = attr.capitalize.gsub('_', ' ')
-      %td= @user.send(attr)
+      - if attr == 'roles'
+        %td
+          = show_roles(@user.get_roles)
+      - else
+        %td= @user.send(attr)
diff --git a/app/views/conference/_registration.html.haml b/app/views/conference/_registration.html.haml
index acee2262..6b91ad77 100644
--- a/app/views/conference/_registration.html.haml
+++ b/app/views/conference/_registration.html.haml
@@ -13,7 +13,7 @@
     -else
       %h4 Registration is Closed, it was from #{ date_string(@conference.registration_start_date, @conference.registration_end_date) }
   - if @conference.registration_open?
-    = link_to "Register for #{@conference.short_title}", register_conference_path(@conference.short_title), :class =>"btn btn-success btn-lg", target: '_blank'
+    = link_to "Register for #{@conference.short_title}", conference_register_path(@conference.short_title), :class =>"btn btn-success btn-lg", target: '_blank'
   - if @conference.use_supporter_levels?
     - if @conference.include_tickets_in_splash?
       = render 'tickets'
diff --git a/app/views/conference_registration/register.html.haml b/app/views/conference_registration/register.html.haml
index 13b6b568..4019ed01 100644
--- a/app/views/conference_registration/register.html.haml
+++ b/app/views/conference_registration/register.html.haml
@@ -1,6 +1,6 @@
 .row
   .col-md-12
-    = semantic_form_for(@registration, :url => register_conference_path(@conference.short_title), :html => { :method => :patch }) do |f|
+    = semantic_form_for(@registration, :url => conference_register_path(@conference.short_title), :html => { :method => :patch }) do |f|
       .tabbable
         %ul.nav.nav-tabs
           %li.active
@@ -16,7 +16,7 @@
               = render 'conference_registration/volunteer', :f => f
       - if @registered
         = f.action :submit, :button_html => { :value => "Update Registration", :class => "btn btn-primary" }
-        = link_to "Unregister", register_conference_path(@conference.short_title),:method => :delete, :class => "btn btn-danger",
+        = link_to "Unregister", conference_register_path(@conference.short_title),:method => :delete, :class => "btn btn-danger",
                     :confirm => "Are you sure you want to unregister?"
       - else
         = f.action :submit, :button_html => { :value => "Register", :class => "btn btn-primary", id: 'register' }
diff --git a/app/views/home/_conference_details.html.haml b/app/views/home/_conference_details.html.haml
index 6b20c75d..22aa89ee 100644
--- a/app/views/home/_conference_details.html.haml
+++ b/app/views/home/_conference_details.html.haml
@@ -31,9 +31,9 @@
                 = link_to "View Conference", conference_path(conference.short_title), :class =>"btn btn-default"
             - if conference.registration_open?
               - if conference.user_registered?(current_user)
-                = link_to "Modify Registration", register_conference_path(conference.short_title), :class =>"btn btn-default"
+                = link_to "Modify Registration", conference_register_path(conference.short_title), :class =>"btn btn-default"
               - else
-                = link_to "Register", register_conference_path(conference.short_title), :class =>"btn btn-success"
+                = link_to "Register", conference_register_path(conference.short_title), :class =>"btn btn-success"
             = link_to "Schedule", conference_schedule_path(conference.short_title), :class =>"btn btn-default" if conference.call_for_papers and conference.call_for_papers.schedule_public
             - if !current_user.nil? && current_user.proposal_count(conference) > 0
               = link_to "View My Proposals", conference_proposal_index_path(conference.short_title), :class =>"btn btn-default"
diff --git a/app/views/home/index.html.haml b/app/views/home/index.html.haml
index f9b27f71..2df959ce 100644
--- a/app/views/home/index.html.haml
+++ b/app/views/home/index.html.haml
@@ -2,4 +2,4 @@
   .col-md-12.page-header
     %h2.text-center Upcoming Conferences
 - @current.each do |conference|
-  = render :partial => "conference_details", :locals => {:conference => conference}
\ No newline at end of file
+  = render :partial => "conference_details", :locals => {:conference => conference}
diff --git a/app/views/layouts/_admin_sidebar.html.haml b/app/views/layouts/_admin_sidebar.html.haml
index 31f8397b..00db00b4 100644
--- a/app/views/layouts/_admin_sidebar.html.haml
+++ b/app/views/layouts/_admin_sidebar.html.haml
@@ -10,97 +10,124 @@
           %span.glyphicon.glyphicon-home
           All Conferences
       - @conferences.each do |conference|
+        - if can? :show, conference
+          %li
+            = link_to(admin_conference_path(conference.short_title)) do
+              %span.glyphicon.glyphicon-cog
+              Manage
+              = conference.short_title
+      - if (current_user.is_admin) || (current_user.has_role? :organizer, :any)
         %li
-          = link_to(admin_conference_path(conference.short_title)) do
-            %span.glyphicon.glyphicon-cog
-            Manage
-            = conference.short_title
-      %li
-        = link_to(new_admin_conference_path) do
-          %span.glyphicon.glyphicon-plus
-          New Conference
+          = link_to(new_admin_conference_path) do
+            %span.glyphicon.glyphicon-plus
+            New Conference
   %hr
-  %li{:class=> "#{active_nav_li(admin_conference_path(@conference.short_title))} nav-header nav-header-bigger"}
-    = link_to(admin_conference_path(@conference.short_title)) do
-      %span.fa.fa-tachometer
-      Dashboard
-  %li{:class=> "#{active_nav_li(edit_admin_conference_path(@conference.short_title))}"}
-    = link_to(edit_admin_conference_path(@conference.short_title)) do
-      %span.fa.fa-home
-      Basics
-    %ul
-      %li{:class=> "#{active_nav_li(edit_admin_conference_contact_path(@conference.short_title))}"}
-        = link_to(edit_admin_conference_contact_path(@conference.short_title)) do
-          %span.fa.fa-envelope-o
-          Contact
-      %li{:class=> "#{active_nav_li(admin_conference_commercials_path(@conference.short_title))}"}
-        = link_to(admin_conference_commercials_path(@conference.short_title)) do
-          %span.fa.fa-film
-          Commercials
-      %li{:class=> "#{active_nav_li(admin_conference_photos_path(@conference.short_title))}"}
-        = link_to(admin_conference_photos_path(@conference.short_title)) do
-          %span.fa.fa-picture-o
-          Photos
-  %li{:class=> active_nav_li(admin_conference_events_path(@conference.short_title))}
-    = link_to(admin_conference_events_path(@conference.short_title)) do
-      %span.glyphicon.glyphicon-comment
-      Events
-  %li{:class=> active_nav_li(admin_conference_registrations_path(@conference.short_title))}
-    = link_to(admin_conference_registrations_path(@conference.short_title)) do
-      %span.glyphicon.glyphicon-user
-      Registrations
-  %li{class: active_nav_li(admin_conference_schedule_path(@conference.short_title))}
-    = link_to(admin_conference_schedule_path(@conference.short_title), target: '_blank') do
-      %span.glyphicon.glyphicon-calendar
-      Schedule
-  %li{class: active_nav_li(admin_conference_campaigns_path(@conference.short_title))}
-    = link_to(admin_conference_campaigns_path(@conference.short_title)) do
-      %span.glyphicon.glyphicon-bullhorn
-      Campaigns
+  - if can? :show, @conference
+    %li{:class=> "#{active_nav_li(admin_conference_path(@conference.short_title))} nav-header nav-header-bigger"}
+      = link_to(admin_conference_path(@conference.short_title)) do
+        %span.fa.fa-tachometer
+        Dashboard
+  - if can? :show, @conference
+    %li{:class=> "#{active_nav_li(edit_admin_conference_path(@conference.short_title))}"}
+      = link_to(edit_admin_conference_path(@conference.short_title)) do
+        %span.fa.fa-home
+        Basics
+      %ul
+        - if can? :update, Contact.new(conference_id: @conference.id)
+          %li{:class=> "#{active_nav_li(edit_admin_conference_contact_path(@conference.short_title))}"}
+            = link_to(edit_admin_conference_contact_path(@conference.short_title)) do
+              %span.fa.fa-envelope-o
+              Contact
+        - if can? :index, @conference.commercials.build
+          %li{:class=> "#{active_nav_li(admin_conference_commercials_path(@conference.short_title))}"}
+            = link_to(admin_conference_commercials_path(@conference.short_title)) do
+              %span.fa.fa-film
+              Commercials
+        - if can? :update, @conference.photos.build
+          %li{:class=> "#{active_nav_li(admin_conference_photos_path(@conference.short_title))}"}
+            = link_to(admin_conference_photos_path(@conference.short_title)) do
+              %span.fa.fa-picture-o
+              Photos
+  - if can? :update, @conference.events.build
+    %li{:class=> active_nav_li(admin_conference_events_path(@conference.short_title))}
+      = link_to(admin_conference_events_path(@conference.short_title)) do
+        %span.glyphicon.glyphicon-comment
+        Events
+  - if can? :update, Registration.new(conference_id: @conference.id)
+    %li{:class=> active_nav_li(admin_conference_registrations_path(@conference.short_title))}
+      = link_to(admin_conference_registrations_path(@conference.short_title)) do
+        %span.glyphicon.glyphicon-user
+        Registrations
+  - if can? :update, @conference.events.build
+    %li{class: active_nav_li(admin_conference_schedule_path(@conference.short_title))}
+      = link_to(admin_conference_schedule_path(@conference.short_title), target: '_blank') do
+        %span.glyphicon.glyphicon-calendar
+        Schedule
+  - if can? :update, @conference
+    %li{class: active_nav_li(admin_conference_campaigns_path(@conference.short_title))}
+      = link_to(admin_conference_campaigns_path(@conference.short_title)) do
+        %span.glyphicon.glyphicon-bullhorn
+        Campaigns
   %hr
-  %li{:class=> "#{active_nav_li(admin_conference_targets_path(@conference.short_title))}"}
-    = link_to(admin_conference_targets_path(@conference.short_title)) do
-      %span.glyphicon.glyphicon-flag
-      Targets
-  %li{:class=> "#{active_nav_li(admin_conference_venue_info_path(@conference.short_title))} myAccordion"}
-    = link_to(admin_conference_venue_info_path(@conference.short_title)) do
-      %span.glyphicon.glyphicon-road
-      Venue
-      %span.small.glyphicon.glyphicon-chevron-right
-    %ul.nav.nav-stacked.nav-pills.small.collapse.subNav
-      %li{:class=> active_nav_li(admin_conference_rooms_path(@conference.short_title))}
-        = link_to 'Rooms', admin_conference_rooms_path(@conference.short_title)
-      %li{ class: active_nav_li(admin_conference_lodgings_path(@conference.short_title)) }
-        = link_to 'Lodgings', admin_conference_lodgings_path(@conference.short_title)
-  %li{:class=> "#{active_nav_li(admin_conference_sponsorship_levels_path(@conference.short_title))} myAccordion" }
-    = link_to(admin_conference_sponsorship_levels_path(@conference.short_title)) do
-      %span.glyphicon.glyphicon-star
-      Sponsorship
-      %span.small.glyphicon.glyphicon-chevron-right
-    %ul.nav.nav-stacked.nav-pills.small.collapse.subNav
-      %li{:class=> active_nav_li(admin_conference_sponsors_path(@conference.short_title))}
-        = link_to 'Sponsors', admin_conference_sponsors_path(@conference.short_title)
-  %li{ class: active_nav_li(admin_conference_supporter_levels_path(@conference.short_title)) }
-    = link_to(admin_conference_supporter_levels_path(@conference.short_title)) do
-      %span.glyphicon.glyphicon-usd
-      Supporter Levels
-  %li{:class=> active_nav_li(admin_conference_emails_path(@conference.short_title))}
-    = link_to(admin_conference_emails_path(@conference.short_title)) do
-      %span.glyphicon.glyphicon-envelope
-      E-Mails
-  %li{:class=> "#{active_nav_li(admin_conference_callforpapers_path(@conference.short_title))} myAccordion"}
-    = link_to(admin_conference_callforpapers_path(@conference.short_title)) do
-      %span.glyphicon.glyphicon-comment
-      Call for papers
-      %span.small.glyphicon.glyphicon-chevron-right
-    %ul.nav.nav-stacked.nav-pills.small.collapse.subNav
-      %li{:class=> active_nav_li(admin_conference_tracks_path(@conference.short_title))}
-        = link_to 'Tracks', admin_conference_tracks_path(@conference.short_title)
-      %li{:class=> active_nav_li(admin_conference_eventtypes_path(@conference.short_title))}
-        = link_to 'Event types', admin_conference_eventtypes_path(@conference.short_title)
-      %li{:class=> active_nav_li(admin_conference_difficulty_levels_path(@conference.short_title))}
-        = link_to 'Difficulty levels', admin_conference_difficulty_levels_path(@conference.short_title)
+  - if can? :update, @conference.targets.build
+    %li{:class=> "#{active_nav_li(admin_conference_targets_path(@conference.short_title))}"}
+      = link_to(admin_conference_targets_path(@conference.short_title)) do
+        %span.glyphicon.glyphicon-flag
+        Targets
+  - if can? :index, @conference.venue
+    %li{:class=> "#{active_nav_li(admin_conference_venue_info_path(@conference.short_title))} myAccordion"}
+      = link_to(admin_conference_venue_info_path(@conference.short_title)) do
+        %span.glyphicon.glyphicon-road
+        Venue
+        %span.small.glyphicon.glyphicon-chevron-right
+      %ul.nav.nav-stacked.nav-pills.small.collapse.subNav
+        - if can? :update, @conference.rooms.build
+          %li{:class=> active_nav_li(admin_conference_rooms_path(@conference.short_title))}
+            = link_to 'Rooms', admin_conference_rooms_path(@conference.short_title)
+        - if can? :update, @conference.venue.lodgings.build
+          %li{ class: active_nav_li(admin_conference_lodgings_path(@conference.short_title)) }
+            = link_to 'Lodgings', admin_conference_lodgings_path(@conference.short_title)
+  - if can? :update, @conference.sponsorship_levels.build
+    %li{:class=> "#{active_nav_li(admin_conference_sponsorship_levels_path(@conference.short_title))} myAccordion" }
+      = link_to(admin_conference_sponsorship_levels_path(@conference.short_title)) do
+        %span.glyphicon.glyphicon-star
+        Sponsorship
+        %span.small.glyphicon.glyphicon-chevron-right
+      %ul.nav.nav-stacked.nav-pills.small.collapse.subNav
+        - if can? :update, @conference.sponsors.build
+          %li{:class=> active_nav_li(admin_conference_sponsors_path(@conference.short_title))}
+            = link_to 'Sponsors', admin_conference_sponsors_path(@conference.short_title)
+  - if can? :update, @conference.supporter_levels.build
+    %li{ class: active_nav_li(admin_conference_supporter_levels_path(@conference.short_title)) }
+      = link_to(admin_conference_supporter_levels_path(@conference.short_title)) do
+        %span.glyphicon.glyphicon-usd
+        Supporter Levels
+  - if can? :update, @conference.email_settings
+    %li{:class=> active_nav_li(admin_conference_emails_path(@conference.short_title))}
+      = link_to(admin_conference_emails_path(@conference.short_title)) do
+        %span.glyphicon.glyphicon-envelope
+        E-Mails
+  - if can? :update, CallForPapers.new(conference_id: @conference.id)
+    %li{:class=> "#{active_nav_li(admin_conference_callforpapers_path(@conference.short_title))} myAccordion"}
+      = link_to(admin_conference_callforpapers_path(@conference.short_title)) do
+        %span.glyphicon.glyphicon-comment
+        Call for papers
+        %span.small.glyphicon.glyphicon-chevron-right
+      %ul.nav.nav-stacked.nav-pills.small.collapse.subNav
+        - if can? :update, @conference.tracks.build
+          %li{:class=> active_nav_li(admin_conference_tracks_path(@conference.short_title))}
+            = link_to 'Tracks', admin_conference_tracks_path(@conference.short_title)
+        - if can? :update, @conference.event_types.build
+          %li{:class=> active_nav_li(admin_conference_event_types_path(@conference.short_title))}
+            = link_to 'Event types', admin_conference_event_types_path(@conference.short_title)
+        - if can? :update, @conference.difficulty_levels.build, conference_id: @conference.id
+          %li{:class=> active_nav_li(admin_conference_difficulty_levels_path(@conference.short_title))}
+            = link_to 'Difficulty levels', admin_conference_difficulty_levels_path(@conference.short_title)
+  - if can? :update, Question.new(conference_id: @conference.id)
     %li{:class=> active_nav_li(admin_conference_questions_path(@conference.short_title))}
       = link_to(admin_conference_questions_path(@conference.short_title)) do
         %span.glyphicon.glyphicon-question-sign
         Questions
+  - if can? :manage, @conference
+    %li{:class=> active_nav_li(roles_admin_conference_path(@conference.short_title))}
+      = link_to 'Roles', roles_admin_conference_path(@conference.short_title)
diff --git a/app/views/layouts/_admin_sidebar_index.html.haml b/app/views/layouts/_admin_sidebar_index.html.haml
index a5f4191c..219d0a56 100644
--- a/app/views/layouts/_admin_sidebar_index.html.haml
+++ b/app/views/layouts/_admin_sidebar_index.html.haml
@@ -10,17 +10,20 @@
           %span.glyphicon.glyphicon-home
           All Conferences
       - @conferences.each do |conference|
+        - if can? :show, conference
+          %li
+            = link_to(admin_conference_path(conference.short_title)) do
+              %span.glyphicon.glyphicon-cog
+              Manage
+              = conference.short_title
+      - if (current_user.is_admin) || (current_user.has_role? :organizer, :any)
         %li
-          = link_to(admin_conference_path(conference.short_title)) do
-            %span.glyphicon.glyphicon-cog
-            Manage
-            = conference.short_title
-      %li
-        = link_to(new_admin_conference_path) do
-          %span.glyphicon.glyphicon-plus
-          New Conference
-  %hr
-  %li
-    = link_to(admin_users_path) do
-      %span.glyphicon.glyphicon-user
-      Users
+          = link_to(new_admin_conference_path) do
+            %span.glyphicon.glyphicon-plus
+            New Conference
+  - if can? :index, User
+    %hr
+    %li
+      = link_to(admin_users_path) do
+        %span.glyphicon.glyphicon-user
+        Users
diff --git a/app/views/layouts/_user_menu.html.haml b/app/views/layouts/_user_menu.html.haml
index bfcbfa6f..3662a129 100644
--- a/app/views/layouts/_user_menu.html.haml
+++ b/app/views/layouts/_user_menu.html.haml
@@ -11,13 +11,13 @@
   = link_to(destroy_user_session_path, :method=>'delete') do
     %span.glyphicon.glyphicon-minus
     Sign out
--if has_role?(current_user, "admin") || has_role?(current_user, "organizer")
+- if can? :index, Conference
   %li.divider
     %li
       = link_to(admin_conference_index_path()) do
         %span.glyphicon.glyphicon-home
         Administration
-    -if @conference and @conference.id
+    -if @conference and @conference.id and can? :show, @conference
       %li
         = link_to(admin_conference_path(@conference.short_title)) do
           %span.glyphicon.glyphicon-cog
diff --git a/app/views/proposal/_form.html.haml b/app/views/proposal/_form.html.haml
index 1a088ed7..0b78cbdb 100644
--- a/app/views/proposal/_form.html.haml
+++ b/app/views/proposal/_form.html.haml
@@ -26,11 +26,14 @@
                       = commercial.commercial_type
                     .flexvideo
                       = render partial: 'shared/media_item', locals: { commercial_type: commercial.commercial_type, commercial_id: commercial.commercial_id }
-                    = link_to 'Edit', edit_conference_proposal_commercial_path(@conference.short_title, @event.id, commercial.id), class: 'btn btn-primary'
-                    = link_to 'Delete', conference_proposal_commercial_path(@conference.short_title, @event.id, commercial.id),
+                    - if can? :update, commercial
+                      = link_to 'Edit', edit_conference_proposal_commercial_path(@conference.short_title, @event.id, commercial.id), class: 'btn btn-primary'
+                    - if can? :destrooy, commercial
+                      = link_to 'Delete', conference_proposal_commercial_path(@conference.short_title, @event.id, commercial.id),
                       :method => :delete, :data => { :confirm => 'Are you sure?' }, class: 'btn btn-danger'
-          %hr
-          = link_to 'Add Commercial', new_conference_proposal_commercial_path(@conference.short_title, @event.id), class: 'btn btn-primary'
+          - if can? :create, @event.commercials.new
+            %hr
+            = link_to 'Add Commercial', new_conference_proposal_commercial_path(@conference.short_title, @event.id), class: 'btn btn-primary'
 
         #attachment-content.tab-pane
           = form_for EventAttachment.new, :url => conference_proposal_event_attachment_index_path(@conference.short_title, @event), :html => { :multipart => true, :id => "fileupload"  } do |f|
diff --git a/app/views/proposal/_proposal_form.html.haml b/app/views/proposal/_proposal_form.html.haml
index 748bd445..d1174766 100644
--- a/app/views/proposal/_proposal_form.html.haml
+++ b/app/views/proposal/_proposal_form.html.haml
@@ -1,20 +1,20 @@
 = semantic_form_for(@event, :url => @url) do |f|
   %section#basic
   = f.inputs :name => "Session Information" do
-    - if !@conference.call_for_papers.schedule_changes && @event.state == "confirmed" && !organizer_or_admin?
+    - if can? :update, @event or can? :create, @event
+      = f.input :title, :as => :string, :required => true
+    - else
       Title: #{@event.title}
       %br
       %br
-    - else
-      = f.input :title, :as => :string, :required => true
     = f.input :subtitle, :as => :string
   %section#details
-    - if (@event.state === "unconfirmed" || @event.state === "confirmed") && !organizer_or_admin? && !@conference.call_for_papers.schedule_changes
+    - if can? :update, @event or can? :create, @event
+      = f.input :event_type_id,:as => :select, :collection => @conference.event_types.map {|x| ["#{x.title} - #{show_time(x.length)}", x.id]}, :include_blank => false, :label => "Session Type"
+    - else
       Event type: #{@event.event_type.title}
       %br
       %br
-    - else
-      = f.input :event_type_id,:as => :select, :collection => @conference.event_types.map {|x| ["#{x.title} - #{show_time(x.length)}", x.id]}, :include_blank => false, :label => "Session Type"
     = f.input :difficulty_level, :as => :select, :collection => @conference.difficulty_levels, :include_blank => "(Please select)" if @conference.use_difficulty_levels
     = f.input :require_registration
     = f.input :abstract, :input_html => {:rows => 5, :class => "span11"},
diff --git a/app/views/proposal/index.html.haml b/app/views/proposal/index.html.haml
index 96c8a4fc..bf53ab15 100644
--- a/app/views/proposal/index.html.haml
+++ b/app/views/proposal/index.html.haml
@@ -2,7 +2,7 @@
   .col-md-12.page-header
     %h1
       = "My Proposals for #{@conference.title}"
-    - if @conference.cfp_open? || organizer_or_admin?
+    - if @conference.cfp_open? || (current_user.has_role? :organizer, @conference)
       = link_to "New Proposal", new_conference_proposal_path(@conference.short_title), :class => "btn btn-success pull-right"
 - if current_user.proposal_count(@conference) > 0
   .row
@@ -27,7 +27,7 @@
                 (Pre-registered: #{pre_registered(event).count})
               - if event.confirmed? && !@conference.user_registered?(current_user)
                 %br
-                = link_to "Register to attend", register_conference_path(@conference.short_title), :style => "font-size:10px;"
+                = link_to "Register to attend", conference_register_path(@conference.short_title), :style => "font-size:10px;"
             %td
               .pull-right
                 - if event.transition_possible? :confirm
diff --git a/app/views/proposal/show.html.haml b/app/views/proposal/show.html.haml
index 167976db..26e474d8 100644
--- a/app/views/proposal/show.html.haml
+++ b/app/views/proposal/show.html.haml
@@ -7,7 +7,7 @@
         %small
           = @event.subtitle
       = link_to "Schedule", conference_schedule_path(@conference.short_title), :class =>"btn btn-success pull-right"
-      - if has_role?(current_user, "admin")
+      - if can? :edit, @event
         = link_to "Edit", edit_admin_conference_event_path(@conference.short_title, @event), :class => "btn btn-mini btn-primary pull-right"
 .row
   .col-md-3
@@ -37,7 +37,7 @@
           %span.label{:style =>"background-color: #{@event.difficulty_level.color};"}
             = @event.difficulty_level.title
     - if @event.require_registration
-      = link_to "Registration required!", register_conference_path(@conference.short_title), :class => "btn btn-xs btn-warning"
+      = link_to "Registration required!", conference_register_path(@conference.short_title), :class => "btn btn-xs btn-warning"
   .col-md-9
     .row
       .col-md-12
diff --git a/config/initializers/rolify.rb b/config/initializers/rolify.rb
new file mode 100644
index 00000000..30651dd0
--- /dev/null
+++ b/config/initializers/rolify.rb
@@ -0,0 +1,8 @@
+Rolify.configure do |config|
+  # By default ORM adapter is ActiveRecord. uncomment to use mongoid
+  # config.use_mongoid
+
+  # Dynamic shortcuts for User class (user.is_admin? like methods). Default is: false
+  # Enable this feature _after_ running rake db:migrate as it relies on the roles table
+  config.use_dynamic_shortcuts
+end
diff --git a/config/routes.rb b/config/routes.rb
index bce18686..89fc6e9e 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -8,6 +8,12 @@ Osem::Application.routes.draw do
     resources :users
     resources :people
     resources :conference do
+      member do
+        get :roles
+        post :roles
+        post :add_user
+        delete :remove_user
+      end
       resource :contact, except: [:index, :new, :create, :show, :destroy]
       resources :photos, except: [:show]
       resource :schedule, only: [:show, :update]
@@ -40,7 +46,7 @@ Osem::Application.routes.draw do
 
       resources :campaigns
 
-      resources :eventtypes, only: [:show, :index] do
+      resources :event_types, only: [:show, :index] do
         collection do
           patch :update
         end
@@ -92,10 +98,11 @@ Osem::Application.routes.draw do
     resource :schedule, only: [] do
       get "/" => "schedule#index"
     end
+
+    get "/register" => "conference_registration#register"
+    patch "/register" => "conference_registration#update"
+    delete "/register" => "conference_registration#unregister"
     member do
-      get "/register" => "conference_registration#register"
-      patch "/register" => "conference_registration#update"
-      delete "/register" => "conference_registration#unregister"
       get "gallery_photos"
       patch "subscription" => "conference#subscribe"
       delete "subscription" => "conference#unsubscribe"
diff --git a/db/migrate/20140711072651_add_description_and_resource_to_roles.rb b/db/migrate/20140711072651_add_description_and_resource_to_roles.rb
new file mode 100644
index 00000000..8e5a16ec
--- /dev/null
+++ b/db/migrate/20140711072651_add_description_and_resource_to_roles.rb
@@ -0,0 +1,10 @@
+class AddDescriptionAndResourceToRoles < ActiveRecord::Migration
+  def change
+    add_column :roles, :description, :string
+    add_reference :roles, :resource, polymorphic: true
+
+    add_index(:roles, :name)
+    add_index(:roles, [:name, :resource_type, :resource_id])
+    add_index(:roles_users, [:user_id, :role_id])
+  end
+end
diff --git a/db/migrate/20140718103856_add_is_admin_to_users.rb b/db/migrate/20140718103856_add_is_admin_to_users.rb
new file mode 100644
index 00000000..1511d822
--- /dev/null
+++ b/db/migrate/20140718103856_add_is_admin_to_users.rb
@@ -0,0 +1,5 @@
+class AddIsAdminToUsers < ActiveRecord::Migration
+  def change
+    add_column :users, :is_admin, :boolean, default: false
+  end
+end
diff --git a/db/migrate/20140730104658_migrate_roles_for_cancancan.rb b/db/migrate/20140730104658_migrate_roles_for_cancancan.rb
new file mode 100644
index 00000000..89efebcd
--- /dev/null
+++ b/db/migrate/20140730104658_migrate_roles_for_cancancan.rb
@@ -0,0 +1,27 @@
+class MigrateRolesForCancancan < ActiveRecord::Migration
+  def up
+    # Store the number of existing roles
+    old_roles = Role.count
+
+    Role.all.each do |role|
+      role.users.each do |user|
+        Conference.all.each do |conference|
+          if role.name == 'Admin' || role.name == 'Organizer'
+            user.add_role :organizer, conference
+          else
+            user.add_role role.name.parameterize.underscore.to_sym, conference
+          end
+        end
+      end
+    end
+
+    # Delete old roles
+    Role.first(old_roles).each do |role|
+      role.destroy
+    end
+  end
+
+  def down
+    raise ActiveRecord::IrreversibleMigration.new('Cannot reverse migration. Deleted events cannot be re-created')
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index b21c54c0..99e48eb8 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -363,15 +363,23 @@ ActiveRecord::Schema.define(version: 20140801170430) do
 
   create_table "roles", force: true do |t|
     t.string   "name"
+    t.string   "description"
+    t.integer  "resource_id"
+    t.string   "resource_type"
     t.datetime "created_at"
     t.datetime "updated_at"
   end
 
+  add_index "roles", ["name", "resource_type", "resource_id"], name: "index_roles_on_name_and_resource_type_and_resource_id"
+  add_index "roles", ["name"], name: "index_roles_on_name"
+
   create_table "roles_users", id: false, force: true do |t|
     t.integer "role_id"
     t.integer "user_id"
   end
 
+  add_index "roles_users", ["user_id", "role_id"], name: "index_roles_users_on_user_id_and_role_id"
+
   create_table "rooms", force: true do |t|
     t.string  "guid",                         null: false
     t.integer "conference_id"
@@ -484,6 +492,7 @@ ActiveRecord::Schema.define(version: 20140801170430) do
     t.string   "tshirt"
     t.string   "languages"
     t.text     "volunteer_experience"
+    t.boolean  "is_admin",               default: false
   end
 
   add_index "users", ["confirmation_token"], name: "index_users_on_confirmation_token", unique: true
diff --git a/db/seeds.rb b/db/seeds.rb
index 92d873a8..91f036d6 100644
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -5,18 +5,18 @@
 #
 #   cities = City.create([{ name: 'Chicago' }, { name: 'Copenhagen' }])
 #   Mayor.create(name: 'Emanuel', city: cities.first)
-Role.create(name: "Participant")
-Role.create(name: "Organizer")
-Role.create(name: "Admin")
 
-qtype_yesno = QuestionType.create(title: "Yes/No")
-QuestionType.create(title: "Single Choice")
-QuestionType.create(title: "Multiple Choice")
+# Questions
+qtype_yesno = QuestionType.create(title: 'Yes/No')
+QuestionType.create(title: 'Single Choice')
+QuestionType.create(title: 'Multiple Choice')
 
-answer_yes = Answer.create(title: "Yes")
-answer_no = Answer.create(title: "No")
+answer_yes = Answer.create(title: 'Yes')
+answer_no = Answer.create(title: 'No')
 
-questions_yes_no = ["Do you need handicapped access to the venue?", "Are you attending with partner?", "Will you attend the social event(s)?", "Will you stay at suggested hotel?"]
+questions_yes_no = ['Do you need handicapped access to the venue?',
+                    'Are you attending with partner?', 'Will you attend the social event(s)?',
+                    'Will you stay at suggested hotel?']
 
 questions_yes_no.each do |i|
   q = Question.create(title: i, question_type_id: qtype_yesno.id, global: true)
diff --git a/spec/controllers/admin/conferences_controller_spec.rb b/spec/controllers/admin/conferences_controller_spec.rb
index e3286fa0..f3e179ab 100644
--- a/spec/controllers/admin/conferences_controller_spec.rb
+++ b/spec/controllers/admin/conferences_controller_spec.rb
@@ -3,16 +3,15 @@ require 'spec_helper'
 describe Admin::ConferenceController do
 
   # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
-
   let(:conference) { create(:conference) }
-  let(:admin) { create(:admin) }
-  let(:organizer) { create(:organizer) }
-  let(:participant) { create(:participant) }
+  let!(:first_user) { create(:user) }
+  let!(:organizer_role) { create(:role, name: 'organizer', resource: conference) }
 
-  shared_examples 'access as administration or organizer' do
+  let(:organizer) { create(:user, role_ids: organizer_role.id) }
+  let(:organizer2) { create(:user, email: 'organizer2@email.osem', role_ids: organizer_role.id) }
+  let(:participant) { create(:user) }
+
+  shared_examples 'access as organizer' do
 
     describe 'PATCH #update' do
 
@@ -45,8 +44,7 @@ describe Admin::ConferenceController do
           mailer = double
           allow(mailer).to receive(:deliver)
           conference.email_settings = create(:email_settings)
-          patch :update, id: conference.short_title, conference:
-              attributes_for(:conference, start_date: Date.today + 2.days, end_date: Date.today + 4.days)
+          patch :update, id: conference.short_title, conference: attributes_for(:conference, start_date: Date.today + 2.days, end_date: Date.today + 4.days)
           conference.reload
           allow(Mailbot).to receive(:conference_date_update_mail).and_return(mailer)
         end
@@ -193,8 +191,12 @@ describe Admin::ConferenceController do
 
       context 'no conferences' do
         it 'redirect to new conference' do
+          Conference.all.each do |c|
+            c.destroy
+          end
+          sign_in create(:admin)
           get :index
-          expect(response).to redirect_to(redirect_to new_admin_conference_path)
+          expect(response).to redirect_to new_admin_conference_path
         end
       end
     end
@@ -210,64 +212,193 @@ describe Admin::ConferenceController do
         expect(response).to render_template :new
       end
     end
-  end
 
-  describe 'administrator access' do
+    describe 'GET #roles' do
+      before(:each) do
+        get :roles, id: conference.short_title
+      end
 
-    before do
-      sign_in(admin)
+      it 'assigns default value to selection' do
+        expect(assigns(:selection)).to eq('organizer')
+      end
+
+      it 'finds the correct role' do
+        expect(assigns(:role)).to eq([organizer_role])
+      end
+
+      it 'properly assigns role_users hash' do
+        expect(assigns(:role_users)).to eq('organizer' => [organizer, organizer2])
+      end
+
+      it 'properly assigns roles variable' do
+        expect(assigns(:roles)).to eq(['Organizer', 'CfP', 'Info Desk', 'Volunteers Coordinator', 'Attendee', 'Volunteer', 'Speaker', 'Sponsor', 'Press', 'Keynote Speaker', ])
+      end
     end
 
-    it_behaves_like 'access as administration or organizer'
+    describe 'POST #roles' do
+      before(:each) do
+        post :roles, id: conference.short_title, user: { roles: 'CfP' }
+      end
 
+      it 'assigns selected value to selection' do
+        expect(assigns(:selection)).to eq('cfp')
+      end
+
+      it 'sets role variable' do
+        post :roles, id: conference.short_title, user: { roles: 'Organizer' }
+        role = Role.where(name: 'organizer', resource: conference)
+        expect(assigns(:role)).to eq(role)
+      end
+
+      it 'sets role variable (returns blank for nil role)' do
+        expect(assigns(:role)).to eq([])
+      end
+
+      it 'sets role_users hash with blank' do
+        expect(assigns(:role_users)).to eq('cfp' => [])
+      end
+
+      it 'sets role_users has with data' do
+        organizer.add_role :cfp, conference
+        post :roles, id: conference.short_title, user: { roles: 'CfP' }
+        expect(assigns(:role_users)).to eq('cfp' => [organizer])
+      end
+
+      it 'sets roles variable' do
+        expect(assigns(:roles)).to eq(['Organizer', 'CfP', 'Info Desk', 'Volunteers Coordinator', 'Attendee', 'Volunteer', 'Speaker', 'Sponsor', 'Press', 'Keynote Speaker', ])
+      end
+    end
+
+    describe 'POST #add_user' do
+      before(:each) do
+        @new_user = create(:user, email: 'new_user@email.osem')
+        post :add_user, id: conference.short_title, user: { email: 'new_user@email.osem' }, role: 'organizer'
+      end
+
+      it 'finds correct user' do
+        expect(assigns(:user)).to eq(@new_user)
+      end
+
+      it 'sets role_users variable' do
+        expect(assigns(:role_users)).to eq('organizer' => organizer_role.users)
+
+        post :add_user, id: conference.short_title, user: { email: 'new_user@email.osem' }, role: 'cfp'
+        expect(assigns(:role_users)).to eq('cfp' => [@new_user])
+      end
+
+      it 'assigns role to user' do
+        expect(@new_user.roles).to eq([organizer_role])
+      end
+
+      it 'assigns second role to user' do
+        post :add_user, id: conference.short_title, user: { email: @new_user.email }, role: 'cfp'
+        cfp_role = Role.find_by(name: 'cfp', resource: conference)
+        expect(@new_user.roles).to eq([organizer_role, cfp_role])
+      end
+    end
+
+    describe 'DELETE #remove_user' do
+      before(:each) do
+
+      end
+
+      it 'sets selection variable' do
+        delete :remove_user, id: conference.short_title, user_id: organizer2.id, role: 'organizer'
+        expect(assigns(:selection)).to eq('organizer')
+      end
+
+      it 'sets role_users hash' do
+        delete :remove_user, id: conference.short_title, user_id: organizer2.id, role: 'organizer'
+        expect(assigns(:role_users)).to eq('organizer' => [organizer])
+      end
+
+      it 'removes role from user' do
+        delete :remove_user, id: conference.short_title, user_id: organizer2.id, role: 'organizer'
+        organizer2.reload
+        expect(organizer2.roles).to eq([])
+      end
+
+      it 'removes second role from user' do
+        # Add cfp role
+        organizer2.add_role :cfp, conference
+        cfp_role = Role.find_by(name: 'cfp', resource: conference)
+        # Remove role organizer
+        delete :remove_user, id: conference.short_title, user_id: organizer2.id, role: 'organizer'
+
+        organizer2.reload
+        expect(organizer2.roles).to include(cfp_role)
+        expect(organizer2.roles[0]).to eq(cfp_role)
+        expect(organizer2.roles.count).to eq(1)
+        expect(assigns(:role_users)).to eq('organizer' => [organizer])
+
+        delete :remove_user, id: conference.short_title, user_id: organizer2.id, role: 'cfp'
+        organizer2.reload
+        expect(organizer2.roles).to eq([])
+      end
+    end
   end
 
   describe 'organizer access' do
 
-    before(:each) do
+    before do
       sign_in(organizer)
     end
 
-    it_behaves_like 'access as administration or organizer'
+    it_behaves_like 'access as organizer'
 
   end
 
-  shared_examples 'access as participant or guest' do |success_path|
+  shared_examples 'access as participant or guest' do |path, message|
     describe 'GET #show' do
-      it 'requires admin privileges' do
+      it 'requires organizer privileges' do
         get :show, id: conference.short_title
-        expect(response).to redirect_to(send(success_path))
+        expect(response).to redirect_to(send(path))
+        if message
+          expect(flash[:alert]).to match(/#{message}/)
+        end
       end
     end
 
     describe 'GET #index' do
-      it 'requires admin privileges' do
+      it 'requires organizer privileges' do
         get :index
-        expect(response).to redirect_to(send(success_path))
+        expect(response).to redirect_to(send(path))
+        if message
+          expect(flash[:alert]).to match(/#{message}/)
+        end
       end
     end
 
     describe 'GET #new' do
-      it 'requires admin privileges' do
+      it 'requires organizer privileges' do
         get :new
-        expect(response).to redirect_to(send(success_path))
+        expect(response).to redirect_to(send(path))
+        if message
+          expect(flash[:alert]).to match(/#{message}/)
+        end
       end
     end
 
     describe 'POST #create' do
-      it 'requires admin privileges' do
+      it 'requires organizer privileges' do
         post :create, conference: attributes_for(:conference,
                                                  short_title: 'ExCon')
-        expect(response).to redirect_to(send(success_path))
+        expect(response).to redirect_to(send(path))
+        if message
+          expect(flash[:alert]).to match(/#{message}/)
+        end
       end
     end
 
     describe 'PATCH #update' do
-      it 'requires admin privileges' do
+      it 'requires organizer privileges' do
         patch :update, id: conference.short_title,
                        conference: attributes_for(:conference,
                                                   short_title: 'ExCon')
-        expect(response).to redirect_to(send(success_path))
+        expect(response).to redirect_to(send(path))
+        if message
+          expect(flash[:alert]).to match(/#{message}/)
+        end
       end
     end
   end
@@ -277,7 +408,7 @@ describe Admin::ConferenceController do
       sign_in(participant)
     end
 
-    it_behaves_like 'access as participant or guest', :root_path
+    it_behaves_like 'access as participant or guest', :root_path, 'You are not authorized to access this area!'
 
   end
 
diff --git a/spec/controllers/admin/users_controller_spec.rb b/spec/controllers/admin/users_controller_spec.rb
index e3f64829..97d11d81 100644
--- a/spec/controllers/admin/users_controller_spec.rb
+++ b/spec/controllers/admin/users_controller_spec.rb
@@ -1,7 +1,5 @@
 require 'spec_helper'
 describe Admin::UsersController do
-  let!(:admin_role) { create(:admin_role) }
-  let!(:participant_role) { create(:participant_role) }
   let(:admin) { create(:admin) }
   let(:user) { create(:user) }
   before(:each) do
@@ -31,13 +29,13 @@ describe Admin::UsersController do
           :user, email: 'example@incoherent.de', id: user.id).email).
               to eq('example@incoherent.de')
       end
-      it "redirects to the updated user" do
+      it 'redirects to the updated user' do
         patch :update, id: user.id
         expect(response).to redirect_to admin_users_path
       end
     end
   end
-  describe 'DELETE #destroy' do 
+  describe 'DELETE #destroy' do
     before :each do
       @user = create(:user)
     end
diff --git a/spec/controllers/conference_controller_spec.rb b/spec/controllers/conference_controller_spec.rb
index 23454ec5..90747dd3 100644
--- a/spec/controllers/conference_controller_spec.rb
+++ b/spec/controllers/conference_controller_spec.rb
@@ -1,7 +1,8 @@
 require 'spec_helper'
 
 describe ConferenceController do
-  let(:conference) { create(:conference) }
+  let(:conference) { create(:conference, make_conference_public: true) }
+
   describe 'GET #show' do
     context 'conference made public' do
       it 'assigns the requested conference to conference' do
@@ -24,7 +25,7 @@ describe ConferenceController do
 
       it 'renders flash saying conference not ready' do
         get :show, id: conference.short_title
-        expect(flash[:notice]).to eq("Conference not ready yet!!")
+        expect(flash[:alert]).to eq('You are not authorized to access this page.')
       end
     end
     context 'gallery photos for splash' do
diff --git a/spec/factories/commercials.rb b/spec/factories/commercials.rb
new file mode 100644
index 00000000..7ebfd744
--- /dev/null
+++ b/spec/factories/commercials.rb
@@ -0,0 +1,8 @@
+# Read about factories at https://github.com/thoughtbot/factory_girl
+
+FactoryGirl.define do
+  factory :commercial do
+    commercial_type 'YouTube'
+    commercial_id 'test'
+  end
+end
diff --git a/spec/factories/roles.rb b/spec/factories/roles.rb
index 6d56375f..15f6d23e 100644
--- a/spec/factories/roles.rb
+++ b/spec/factories/roles.rb
@@ -1,16 +1,12 @@
 FactoryGirl.define do
   factory :role do
 
-    factory :admin_role do
-      name 'Admin'
-    end
-
     factory :organizer_role do
-      name 'Organizer'
+      name 'organizer'
     end
 
-    factory :participant_role do
-      name 'Participant'
+    factory :cfp_role do
+      name 'cfp'
     end
   end
 end
diff --git a/spec/factories/users.rb b/spec/factories/users.rb
index 7ab2b62c..d404aefb 100644
--- a/spec/factories/users.rb
+++ b/spec/factories/users.rb
@@ -15,12 +15,8 @@ FactoryGirl.define do
       gravida.
     EOS
 
-    factory :participant do
-      after(:create) { |user| user.role_ids = create(:participant_role).id }
-    end
-
     factory :admin do
-      after(:create) { |user| user.role_ids = create(:admin_role).id }
+      is_admin true
     end
 
     factory :organizer do
diff --git a/spec/features/ability_spec.rb b/spec/features/ability_spec.rb
new file mode 100644
index 00000000..616fdf0e
--- /dev/null
+++ b/spec/features/ability_spec.rb
@@ -0,0 +1,302 @@
+require 'spec_helper'
+
+feature 'Has correct abilities' do
+  # It is necessary to use bang version of let to build roles before user
+  let(:conference1) { create(:conference) } # user is organizer
+  let(:conference2) { create(:conference) } # user is cfp
+  let(:conference3) { create(:conference) } # user is info_desk
+  let(:conference4) { create(:conference) } # user is volunteer coordinator
+  let(:conference5) { create(:conference) } # user has no role
+
+  let(:role_organizer) { create(:role, name: 'organizer', resource: conference1) }
+  let(:role_cfp) { create(:role, name: 'cfp', resource: conference2) }
+  let(:role_info_desk) { create(:role, name: 'info_desk', resource: conference3) }
+  let(:role_volunteer_coordinator) { create(:role, name: 'volunteer_coordinator', resource: conference4) }
+
+  let(:user) { create(:user, role_ids: [role_organizer.id, role_cfp.id, role_info_desk.id, role_volunteer_coordinator.id]) }
+
+  scenario 'when user is organizer' do
+    sign_in user
+    visit admin_conference_path(conference1.short_title)
+
+    expect(page).to have_selector('li.nav-header.nav-header-bigger a', text: 'Dashboard')
+    expect(page).to have_link('Basics', href: "/admin/conference/#{conference1.short_title}/edit")
+    expect(page).to have_link('Contact', href: "/admin/conference/#{conference1.short_title}/contact/edit")
+    expect(page).to have_link('Commercials', href: "/admin/conference/#{conference1.short_title}/commercials")
+    expect(page).to have_link('Photos', href: "/admin/conference/#{conference1.short_title}/photos")
+    expect(page).to have_link('Events', href: "/admin/conference/#{conference1.short_title}/events")
+    expect(page).to have_link('Registrations', href: "/admin/conference/#{conference1.short_title}/registrations")
+    expect(page).to have_link('Schedule', href: "/admin/conference/#{conference1.short_title}/schedule")
+    expect(page).to have_link('Campaigns', href: "/admin/conference/#{conference1.short_title}/campaigns")
+    expect(page).to have_link('Targets', href: "/admin/conference/#{conference1.short_title}/targets")
+    expect(page).to have_link('Venue', href: "/admin/conference/#{conference1.short_title}/venue")
+    expect(page).to have_link('Rooms', href: "/admin/conference/#{conference1.short_title}/rooms")
+    expect(page).to have_link('Lodgings', href: "/admin/conference/#{conference1.short_title}/lodgings")
+    expect(page).to have_link('Sponsorship', href: "/admin/conference/#{conference1.short_title}/sponsorship_levels")
+    expect(page).to have_link('Sponsors', href: "/admin/conference/#{conference1.short_title}/sponsors")
+    expect(page).to have_link('Supporter Levels', href: "/admin/conference/#{conference1.short_title}/supporter_levels")
+    expect(page).to have_link('E-Mails', href: "/admin/conference/#{conference1.short_title}/emails")
+    expect(page).to have_link('Call for papers', href: "/admin/conference/#{conference1.short_title}/callforpapers")
+    expect(page).to have_link('Tracks', href: "/admin/conference/#{conference1.short_title}/tracks")
+    expect(page).to have_link('Event types', href: "/admin/conference/#{conference1.short_title}/event_types")
+    expect(page).to have_link('Difficulty levels', href: "/admin/conference/#{conference1.short_title}/difficulty_levels")
+    expect(page).to have_link('Questions', href: "/admin/conference/#{conference1.short_title}/questions")
+    expect(page).to have_link('Roles', href: "/admin/conference/#{conference1.short_title}/roles")
+
+    visit edit_admin_conference_path(conference1.short_title)
+    expect(current_path).to eq(edit_admin_conference_path(conference1.short_title))
+
+    visit admin_conference_path(conference1.short_title)
+    expect(current_path).to eq(admin_conference_path(conference1.short_title))
+
+    visit admin_conference_registrations_path(conference1.short_title)
+    expect(current_path).to eq(admin_conference_registrations_path(conference1.short_title))
+
+    visit admin_conference_events_path(conference1.short_title)
+    expect(current_path).to eq(admin_conference_events_path(conference1.short_title))
+
+    visit admin_conference_schedule_path(conference1.short_title)
+    expect(current_path).to eq(admin_conference_schedule_path(conference1.short_title))
+
+    visit admin_conference_campaigns_path(conference1.short_title)
+    expect(current_path).to eq(admin_conference_campaigns_path(conference1.short_title))
+
+    visit admin_conference_targets_path(conference1.short_title)
+    expect(current_path).to eq(admin_conference_targets_path(conference1.short_title))
+
+    visit admin_conference_venue_info_path(conference1.short_title)
+    expect(current_path).to eq(admin_conference_venue_info_path(conference1.short_title))
+
+    visit admin_conference_sponsorship_levels_path(conference1.short_title)
+    expect(current_path).to eq(admin_conference_sponsorship_levels_path(conference1.short_title))
+
+    visit admin_conference_supporter_levels_path(conference1.short_title)
+    expect(current_path).to eq(admin_conference_supporter_levels_path(conference1.short_title))
+
+    visit admin_conference_emails_path(conference1.short_title)
+    expect(current_path).to eq(admin_conference_emails_path(conference1.short_title))
+
+    visit admin_conference_callforpapers_path(conference1.short_title)
+    expect(current_path).to eq(admin_conference_callforpapers_path(conference1.short_title))
+
+    visit admin_conference_questions_path(conference1.short_title)
+    expect(current_path).to eq(admin_conference_questions_path(conference1.short_title))
+
+    visit admin_conference_commercials_path(conference1.short_title)
+    expect(current_path).to eq(admin_conference_commercials_path(conference1.short_title))
+  end
+
+  scenario 'when user is cfp' do
+    sign_in user
+    visit admin_conference_path(conference2.short_title)
+
+    expect(page).to have_selector('li.nav-header.nav-header-bigger a', text: 'Dashboard')
+    expect(page).to have_link('Basics', href: "/admin/conference/#{conference2.short_title}/edit")
+    expect(page).to_not have_link('Contact', href: "/admin/conference/#{conference2.short_title}/contact/edit")
+    expect(page).to have_link('Commercials', href: "/admin/conference/#{conference2.short_title}/commercials")
+    expect(page).to_not have_link('Photos', href: "/admin/conference/#{conference2.short_title}/photos")
+    expect(page).to have_link('Events', href: "/admin/conference/#{conference2.short_title}/events")
+    expect(page).to_not have_link('Registrations', href: "/admin/conference/#{conference2.short_title}/registrations")
+    expect(page).to have_link('Schedule', href: "/admin/conference/#{conference2.short_title}/schedule")
+    expect(page).to_not have_link('Campaigns', href: "/admin/conference/#{conference2.short_title}/campaigns")
+    expect(page).to_not have_link('Targets', href: "/admin/conference/#{conference2.short_title}/targets")
+    expect(page).to have_link('Venue', href: "/admin/conference/#{conference2.short_title}/venue")
+    expect(page).to have_link('Rooms', href: "/admin/conference/#{conference2.short_title}/rooms")
+    expect(page).to_not have_link('Lodgings', href: "/admin/conference/#{conference2.short_title}/lodgings")
+    expect(page).to_not have_link('Sponsorship', href: "/admin/conference/#{conference2.short_title}/sponsorship_levels")
+    expect(page).to_not have_link('Sponsors', href: "/admin/conference/#{conference2.short_title}/sponsors")
+    expect(page).to_not have_link('Supporter Levels', href: "/admin/conference/#{conference2.short_title}/supporter_levels")
+    expect(page).to have_link('E-Mails', href: "/admin/conference/#{conference2.short_title}/emails")
+    expect(page).to have_link('Call for papers', href: "/admin/conference/#{conference2.short_title}/callforpapers")
+    expect(page).to have_link('Tracks', href: "/admin/conference/#{conference2.short_title}/tracks")
+    expect(page).to have_link('Event types', href: "/admin/conference/#{conference2.short_title}/event_types")
+    expect(page).to have_link('Difficulty levels', href: "/admin/conference/#{conference2.short_title}/difficulty_levels")
+    expect(page).to_not have_link('Questions', href: "/admin/conference/#{conference2.short_title}/questions")
+    expect(page).to_not have_link('Roles', href: "/admin/conference/#{conference2.short_title}/roles")
+
+    visit edit_admin_conference_path(conference2.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_path(conference2.short_title)
+    expect(current_path).to eq(admin_conference_path(conference2.short_title))
+
+    visit admin_conference_registrations_path(conference2.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_events_path(conference2.short_title)
+    expect(current_path).to eq(admin_conference_events_path(conference2.short_title))
+
+    visit admin_conference_schedule_path(conference2.short_title)
+    expect(current_path).to eq(admin_conference_schedule_path(conference2.short_title))
+
+    visit admin_conference_campaigns_path(conference2.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_targets_path(conference2.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_venue_info_path(conference2.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_sponsorship_levels_path(conference2.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_supporter_levels_path(conference2.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_emails_path(conference2.short_title)
+    expect(current_path).to eq(admin_conference_emails_path(conference2.short_title))
+
+    visit admin_conference_callforpapers_path(conference2.short_title)
+    expect(current_path).to eq(admin_conference_callforpapers_path(conference2.short_title))
+
+    visit admin_conference_questions_path(conference2.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_commercials_path(conference2.short_title)
+    expect(current_path).to eq(admin_conference_commercials_path(conference2.short_title))
+  end
+
+  scenario 'when user is info desk' do
+    sign_in user
+    visit admin_conference_path(conference3.short_title)
+
+    expect(page).to have_selector('li.nav-header.nav-header-bigger a', text: 'Dashboard')
+    expect(page).to have_link('Basics', href: "/admin/conference/#{conference3.short_title}/edit")
+    expect(page).to_not have_link('Contact', href: "/admin/conference/#{conference3.short_title}/contact/edit")
+    expect(page).to have_link('Commercials', href: "/admin/conference/#{conference3.short_title}/commercials")
+    expect(page).to_not have_link('Photos', href: "/admin/conference/#{conference3.short_title}/photos")
+    expect(page).to_not have_link('Events', href: "/admin/conference/#{conference3.short_title}/events")
+    expect(page).to have_link('Registrations', href: "/admin/conference/#{conference3.short_title}/registrations")
+    expect(page).to_not have_link('Schedule', href: "/admin/conference/#{conference3.short_title}/schedule")
+    expect(page).to_not have_link('Campaigns', href: "/admin/conference/#{conference3.short_title}/campaigns")
+    expect(page).to_not have_link('Targets', href: "/admin/conference/#{conference3.short_title}/targets")
+    expect(page).to_not have_link('Venue', href: "/admin/conference/#{conference3.short_title}/venue")
+    expect(page).to_not have_link('Rooms', href: "/admin/conference/#{conference3.short_title}/rooms")
+    expect(page).to_not have_link('Lodgings', href: "/admin/conference/#{conference3.short_title}/lodgings")
+    expect(page).to_not have_link('Sponsorship', href: "/admin/conference/#{conference3.short_title}/sponsorship_levels")
+    expect(page).to_not have_link('Sponsors', href: "/admin/conference/#{conference3.short_title}/sponsors")
+    expect(page).to_not have_link('Supporter Levels', href: "/admin/conference/#{conference3.short_title}/supporter_levels")
+    expect(page).to_not have_link('E-Mails', href: "/admin/conference/#{conference3.short_title}/emails")
+    expect(page).to_not have_link('Call for papers', href: "/admin/conference/#{conference3.short_title}/callforpapers")
+    expect(page).to_not have_link('Tracks', href: "/admin/conference/#{conference3.short_title}/tracks")
+    expect(page).to_not have_link('Event types', href: "/admin/conference/#{conference3.short_title}/event_types")
+    expect(page).to_not have_link('Difficulty levels', href: "/admin/conference/#{conference3.short_title}/difficulty_levels")
+    expect(page).to have_link('Questions', href: "/admin/conference/#{conference3.short_title}/questions")
+    expect(page).to_not have_link('Roles', href: "/admin/conference/#{conference3.short_title}/roles")
+
+    visit edit_admin_conference_path(conference3.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_path(conference3.short_title)
+    expect(current_path).to eq(admin_conference_path(conference3.short_title))
+
+    visit admin_conference_registrations_path(conference3.short_title)
+    expect(current_path).to eq(admin_conference_registrations_path(conference3.short_title))
+
+    visit admin_conference_events_path(conference3.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_schedule_path(conference3.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_campaigns_path(conference3.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_targets_path(conference3.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_venue_info_path(conference3.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_sponsorship_levels_path(conference3.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_supporter_levels_path(conference3.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_emails_path(conference3.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_callforpapers_path(conference3.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_questions_path(conference3.short_title)
+    expect(current_path).to eq(admin_conference_questions_path(conference3.short_title))
+
+    visit admin_conference_commercials_path(conference3.short_title)
+    expect(current_path).to eq(admin_conference_commercials_path(conference3.short_title))
+
+  end
+
+  scenario 'when user is volunteer coordinator' do
+    sign_in user
+    visit admin_conference_path(conference4.short_title)
+
+    expect(page).to have_selector('li.nav-header.nav-header-bigger a', text: 'Dashboard')
+    expect(page).to have_link('Basics', href: "/admin/conference/#{conference4.short_title}/edit")
+    expect(page).to_not have_link('Contact', href: "/admin/conference/#{conference4.short_title}/contact/edit")
+    expect(page).to have_link('Commercials', href: "/admin/conference/#{conference4.short_title}/commercials")
+    expect(page).to_not have_link('Photos', href: "/admin/conference/#{conference4.short_title}/photos")
+    expect(page).to_not have_link('Events', href: "/admin/conference/#{conference4.short_title}/events")
+    expect(page).to_not have_link('Registrations', href: "/admin/conference/#{conference4.short_title}/registrations")
+    expect(page).to_not have_link('Schedule', href: "/admin/conference/#{conference4.short_title}/schedule")
+    expect(page).to_not have_link('Campaigns', href: "/admin/conference/#{conference4.short_title}/campaigns")
+    expect(page).to_not have_link('Targets', href: "/admin/conference/#{conference4.short_title}/targets")
+    expect(page).to_not have_link('Venue', href: "/admin/conference/#{conference4.short_title}/venue")
+    expect(page).to_not have_link('Rooms', href: "/admin/conference/#{conference4.short_title}/rooms")
+    expect(page).to_not have_link('Lodgings', href: "/admin/conference/#{conference4.short_title}/lodgings")
+    expect(page).to_not have_link('Sponsorship', href: "/admin/conference/#{conference4.short_title}/sponsorship_levels")
+    expect(page).to_not have_link('Sponsors', href: "/admin/conference/#{conference4.short_title}/sponsors")
+    expect(page).to_not have_link('Supporter Levels', href: "/admin/conference/#{conference4.short_title}/supporter_levels")
+    expect(page).to_not have_link('E-Mails', href: "/admin/conference/#{conference4.short_title}/emails")
+    expect(page).to_not have_link('Call for papers', href: "/admin/conference/#{conference4.short_title}/callforpapers")
+    expect(page).to_not have_link('Tracks', href: "/admin/conference/#{conference4.short_title}/tracks")
+    expect(page).to_not have_link('Event types', href: "/admin/conference/#{conference4.short_title}/event_types")
+    expect(page).to_not have_link('Difficulty levels', href: "/admin/conference/#{conference4.short_title}/difficulty_levels")
+    expect(page).to_not have_link('Questions', href: "/admin/conference/#{conference4.short_title}/questions")
+    expect(page).to_not have_link('Roles', href: "/admin/conference/#{conference4.short_title}/roles")
+
+    visit edit_admin_conference_path(conference4.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_path(conference4.short_title)
+    expect(current_path).to eq(admin_conference_path(conference4.short_title))
+
+    visit admin_conference_registrations_path(conference4.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_events_path(conference4.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_schedule_path(conference4.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_campaigns_path(conference4.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_targets_path(conference4.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_venue_info_path(conference4.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_sponsorship_levels_path(conference4.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_supporter_levels_path(conference4.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_emails_path(conference4.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_callforpapers_path(conference4.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_questions_path(conference4.short_title)
+    expect(current_path).to eq(root_path)
+
+    visit admin_conference_commercials_path(conference4.short_title)
+    expect(current_path).to eq(admin_conference_commercials_path(conference4.short_title))
+  end
+end
diff --git a/spec/features/campaign_spec.rb b/spec/features/campaign_spec.rb
index 9c71a759..21382655 100644
--- a/spec/features/campaign_spec.rb
+++ b/spec/features/campaign_spec.rb
@@ -2,16 +2,14 @@ require 'spec_helper'
 
 feature Campaign do
 
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
+  let!(:conference) { create(:conference, short_title: 'osc14') }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
-  shared_examples 'add and update campaign' do |user|
+  shared_examples 'add and update campaign' do
     scenario 'adds and update a campaign', feature: true, js: true do
       expected_count = Campaign.count + 1
-      conference = create(:conference, short_title: 'osc14')
-      sign_in create(user)
+      sign_in organizer
 
       visit admin_conference_campaigns_path(conference.short_title)
 
@@ -42,7 +40,7 @@ feature Campaign do
 
       expect(Campaign.count).to eq(expected_count)
 
-      campaign = Campaign.where('name'=> 'Test Campaign').first
+      campaign = Campaign.where('name' => 'Test Campaign').first
       visit edit_admin_conference_campaign_path(conference.short_title, campaign.id)
 
       fill_in 'campaign_name', with: 'Test Campaign 42'
@@ -52,8 +50,7 @@ feature Campaign do
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'add and update campaign', :admin
-    it_behaves_like 'add and update campaign', :organizer
+  describe 'organizer' do
+    it_behaves_like 'add and update campaign'
   end
 end
diff --git a/spec/features/cfp_spec.rb b/spec/features/cfp_spec.rb
index 4c185872..23f2458a 100644
--- a/spec/features/cfp_spec.rb
+++ b/spec/features/cfp_spec.rb
@@ -2,16 +2,15 @@ require 'spec_helper'
 
 feature Conference do
 
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
-  shared_examples 'add and update cfp' do |user|
+  shared_examples 'add and update cfp' do
     scenario 'adds a new cfp', feature: true, js: true do
       expected_count = CallForPapers.count + 1
-      conference = create(:conference)
-      sign_in create(user)
+
+      sign_in organizer
 
       visit admin_conference_callforpapers_path(conference.short_title)
 
@@ -47,11 +46,10 @@ feature Conference do
     end
 
     scenario 'update cfp', feature: true, js: true do
-      conference = create(:conference)
       conference.call_for_papers = create(:call_for_papers)
       expected_count = CallForPapers.count
 
-      sign_in create(user)
+      sign_in organizer
       visit admin_conference_callforpapers_path(conference.short_title)
 
       # Validate update with empty start date will not saved
@@ -87,8 +85,7 @@ feature Conference do
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'add and update cfp', :admin
-    it_behaves_like 'add and update cfp', :organizer
+  describe 'organizer' do
+    it_behaves_like 'add and update cfp'
   end
 end
diff --git a/spec/features/commercials_spec.rb b/spec/features/commercials_spec.rb
index e180443d..e53524b7 100644
--- a/spec/features/commercials_spec.rb
+++ b/spec/features/commercials_spec.rb
@@ -2,18 +2,17 @@ require 'spec_helper'
 
 feature Commercial do
   # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
-  shared_examples 'adds and updates a commercial' do |user|
+  shared_examples 'adds and updates a commercial' do
     scenario 'of a conference',
              feature: true, js: true do
 
-      conference = create(:conference)
       expected_count = conference.commercials.count + 1
 
-      sign_in create(user)
+      sign_in organizer
 
       visit admin_conference_commercials_path(conference.short_title)
 
@@ -61,11 +60,7 @@ feature Commercial do
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'adds and updates a commercial', :admin
-  end
-
   describe 'organizer' do
-    it_behaves_like 'adds and updates a commercial', :organizer
+    it_behaves_like 'adds and updates a commercial'
   end
 end
diff --git a/spec/features/conference_spec.rb b/spec/features/conference_spec.rb
index feed1eb8..45977092 100644
--- a/spec/features/conference_spec.rb
+++ b/spec/features/conference_spec.rb
@@ -1,16 +1,12 @@
 require 'spec_helper'
 
 feature Conference do
+  let!(:user) { create(:admin) }
 
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
-
-  shared_examples 'add and update conference' do |user|
+  shared_examples 'add and update conference' do
     scenario 'adds a new conference', feature: true, js: true do
       expected_count = Conference.count + 1
-      sign_in create(user)
+      sign_in user
 
       visit new_admin_conference_path
       fill_in 'conference_title', with: 'Example Con'
@@ -31,12 +27,18 @@ feature Conference do
       expect(flash).
           to eq('Conference was successfully created.')
       expect(Conference.count).to eq(expected_count)
+
+      expect(user.has_role? :organizer, Conference.last).to eq(true)
     end
 
     scenario 'update conference', feature: true, js: true do
       conference = create(:conference)
+      organizer_role = create(:organizer_role, resource: conference)
+      organizer = create(:user, role_ids: [organizer_role.id])
+
       expected_count = Conference.count
-      sign_in create(user)
+
+      sign_in organizer
 
       visit edit_admin_conference_path(conference.short_title)
       click_link 'Edit'
@@ -63,11 +65,6 @@ feature Conference do
   end
 
   describe 'admin' do
-    it_behaves_like 'add and update conference', :admin
+    it_behaves_like 'add and update conference'
   end
-
-  describe 'organizer' do
-    it_behaves_like 'add and update conference', :organizer
-  end
-
 end
diff --git a/spec/features/contact_spec.rb b/spec/features/contact_spec.rb
index 2a7bff79..1876ae0d 100644
--- a/spec/features/contact_spec.rb
+++ b/spec/features/contact_spec.rb
@@ -2,18 +2,16 @@ require 'spec_helper'
 
 feature Contact do
 
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, email: 'admin@example.com', role_ids: [organizer_role.id]) }
 
-  shared_examples 'update a contact' do |user|
+  shared_examples 'update a contact' do
 
     scenario 'sucessfully', feature: true, js: true do
-      conference = create(:conference)
       contact = conference.contact
       expected_count = Contact.count
-      sign_in create(user)
+      sign_in organizer
 
       visit edit_admin_conference_contact_path(conference.short_title)
       click_link 'Edit'
@@ -39,10 +37,6 @@ feature Contact do
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'update a contact', :admin
-  end
-
   describe 'organizer' do
     it_behaves_like 'update a contact', :organizer
   end
diff --git a/spec/features/difficulty_levels_spec.rb b/spec/features/difficulty_levels_spec.rb
index 6dcfb990..b81f9d00 100644
--- a/spec/features/difficulty_levels_spec.rb
+++ b/spec/features/difficulty_levels_spec.rb
@@ -1,15 +1,14 @@
 require 'spec_helper'
 
 feature DifficultyLevel do
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
-  shared_examples 'difficulty levels' do |user|
+  shared_examples 'difficulty levels' do
     scenario 'adds and updates difficulty level', feature: true, js: true do
-      conference = create(:conference)
-      sign_in create(user)
+
+      sign_in organizer
       visit admin_conference_difficulty_levels_path(
                 conference_id: conference.short_title)
 
@@ -50,11 +49,7 @@ feature DifficultyLevel do
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'difficulty levels', :admin
-  end
-
   describe 'organizer' do
-    it_behaves_like 'difficulty levels', :organizer
+    it_behaves_like 'difficulty levels'
   end
 end
diff --git a/spec/features/email_spec.rb b/spec/features/email_spec.rb
index c5838f31..7ba66e17 100644
--- a/spec/features/email_spec.rb
+++ b/spec/features/email_spec.rb
@@ -1,19 +1,17 @@
 require 'spec_helper'
 
 feature EmailSettings do
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
-  shared_examples 'email settings' do |user|
+  shared_examples 'email settings' do
     scenario 'updates email settings',
              feature: true, js: true do
 
-      conference = create(:conference)
       expected_count = EmailSettings.count
 
-      sign_in create(user)
+      sign_in organizer
 
       visit admin_conference_emails_path(conference.short_title)
 
@@ -91,11 +89,7 @@ feature EmailSettings do
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'email settings', :admin
-  end
-
   describe 'organizer' do
-    it_behaves_like 'email settings', :organizer
+    it_behaves_like 'email settings'
   end
 end
diff --git a/spec/features/event_types_spec.rb b/spec/features/event_types_spec.rb
index c900c65d..a71aacfa 100644
--- a/spec/features/event_types_spec.rb
+++ b/spec/features/event_types_spec.rb
@@ -1,19 +1,18 @@
 require 'spec_helper'
 
 feature EventType do
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
-  shared_examples 'event types' do |user|
+  shared_examples 'event types' do
     scenario 'adds and updates event type', feature: true, js: true do
-      conference = create(:conference)
-      sign_in create(user)
-      visit admin_conference_eventtypes_path(
+
+      sign_in organizer
+      visit admin_conference_event_types_path(
                 conference_id: conference.short_title)
 
-      expect(page.all('div.nested-fields').count == 2).to be true 
+      expect(page.all('div.nested-fields').count == 2).to be true
       # Add event type
       click_link 'Add event_type'
       expect(page.all('div.nested-fields').count == 3).to be true
@@ -55,11 +54,7 @@ feature EventType do
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'event types', :admin
-  end
-
   describe 'organizer' do
-    it_behaves_like 'event types', :organizer
+    it_behaves_like 'event types'
   end
 end
diff --git a/spec/features/lodgings_spec.rb b/spec/features/lodgings_spec.rb
index 10576cc9..89a73ea8 100644
--- a/spec/features/lodgings_spec.rb
+++ b/spec/features/lodgings_spec.rb
@@ -1,17 +1,16 @@
 require 'spec_helper'
 
 feature Lodging do
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
-  shared_examples 'lodgings' do |user|
+  shared_examples 'lodgings' do
     scenario 'adds and updates lodgings', feature: true, js: true do
       path = "#{Rails.root}/app/assets/images/rails.png"
-      conference = create(:conference)
+
       conference.venue = create(:venue)
-      sign_in create(user)
+      sign_in organizer
       visit admin_conference_lodgings_path(
                 conference_id: conference.short_title)
       # Add lodging
@@ -56,11 +55,7 @@ feature Lodging do
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'lodgings', :admin
-  end
-
   describe 'organizer' do
-    it_behaves_like 'lodgings', :organizer
+    it_behaves_like 'lodgings'
   end
 end
diff --git a/spec/features/omniauth_spec.rb b/spec/features/omniauth_spec.rb
index 41cbb76e..3d343a8f 100644
--- a/spec/features/omniauth_spec.rb
+++ b/spec/features/omniauth_spec.rb
@@ -1,9 +1,6 @@
 require 'spec_helper'
 
 feature Openid do
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
-
   shared_examples 'sign in with openid' do
 
     scenario 'has option to log in with Google account' do
@@ -27,7 +24,7 @@ feature Openid do
     end
 
     scenario 'signs in an existing user' do
-      create(:participant, email: 'test-participant-1@google.com')
+      create(:user, email: 'test-participant-1@google.com')
       expected_count_openid = Openid.count + 1
       expected_count_user = User.count
       visit '/accounts/sign_in'
@@ -54,7 +51,7 @@ feature Openid do
 
     scenario 'adds openid to existing user' do
       # Sign in user
-      user = create(:participant, email: 'test-participant-1@google.com')
+      user = create(:user, email: 'test-participant-1@google.com')
       sign_in user
 
       # Add openID to current user
@@ -74,7 +71,7 @@ feature Openid do
 
     scenario 'signs in with openID using the same email as another associated openid' do
       # Sign in user
-      create(:participant, email: 'test-participant-1@google.com')
+      create(:user, email: 'test-participant-1@google.com')
       expected_count_openid = Openid.count + 1
       expected_count_user = User.count
       visit '/accounts/sign_in'
diff --git a/spec/features/photo_spec.rb b/spec/features/photo_spec.rb
index c9150b30..9f9a94c0 100644
--- a/spec/features/photo_spec.rb
+++ b/spec/features/photo_spec.rb
@@ -2,16 +2,15 @@ require 'spec_helper'
 
 feature Photo do
 
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, email: 'admin@example.com', role_ids: [organizer_role.id]) }
 
-  shared_examples 'add and update photo' do |user|
+  shared_examples 'add and update photo' do
     scenario 'adds a new photo', feature: true, js: true do
       expected_count = Photo.count + 1
-      conference = create(:conference)
-      sign_in create(user)
+
+      sign_in organizer
 
       visit new_admin_conference_photo_path(conference.short_title)
 
@@ -28,9 +27,8 @@ feature Photo do
 
     scenario 'updates a photo', feature: true, js: true do
       expected_count = Photo.count + 1
-      conference = create(:conference)
-      photo = create(:photo)
-      sign_in create(user)
+      photo = create(:photo, conference_id: conference.id)
+      sign_in organizer
 
       visit edit_admin_conference_photo_path(conference.short_title, photo.id)
 
@@ -47,8 +45,7 @@ feature Photo do
 
     scenario 'adds a text file', feature: true, js: true do
       expected_count = Photo.count
-      conference = create(:conference)
-      sign_in create(user)
+      sign_in organizer
 
       visit new_admin_conference_photo_path(conference.short_title)
 
@@ -64,12 +61,8 @@ feature Photo do
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'add and update photo', :admin
-  end
-
   describe 'organizer' do
-    it_behaves_like 'add and update photo', :organizer
+    it_behaves_like 'add and update photo'
   end
 
 end
diff --git a/spec/features/proposal_spec.rb b/spec/features/proposal_spec.rb
index 68c5f9e0..1f4aa796 100644
--- a/spec/features/proposal_spec.rb
+++ b/spec/features/proposal_spec.rb
@@ -1,20 +1,17 @@
 require 'spec_helper'
 
 feature Event do
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, email: 'admin@example.com', role_ids: [organizer_role.id]) }
+  let!(:participant) { create(:user, biography: '') }
 
   shared_examples 'proposal workflow' do
     scenario 'submitts a proposal, accepts and confirms',
              feature: true, js: true do
 
-      admin = create(:admin, email: 'admin@example.com')
-      participant = create(:participant, email: 'participant@example.com', biography: "")
-
       expected_count = Event.count + 1
-      conference = create(:conference)
+
       conference.call_for_papers = create(:call_for_papers)
       conference.email_settings = create(:email_settings)
       conference.event_types = [create(:event_type)]
@@ -38,7 +35,7 @@ feature Event do
       click_button 'Create Event'
       expect(flash).to eq('Event was successfully submitted. You should register for the conference now.')
 
-      expect(current_path).to eq(register_conference_path(conference.short_title))
+      expect(current_path).to eq(conference_register_path(conference.short_title))
 
       expect(Event.count).to eq(expected_count)
 
@@ -99,7 +96,7 @@ feature Event do
       expect(event.commercials.count).to eq(expected_count_commercial - 1)
 
       sign_out
-      sign_in admin
+      sign_in organizer
 
       # Reject proposal
       visit admin_conference_events_path(conference.short_title)
diff --git a/spec/features/rooms_spec.rb b/spec/features/rooms_spec.rb
index dc88f9bd..23911004 100644
--- a/spec/features/rooms_spec.rb
+++ b/spec/features/rooms_spec.rb
@@ -1,15 +1,14 @@
 require 'spec_helper'
 
 feature Room do
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
-  shared_examples 'rooms' do |user|
+  shared_examples 'rooms' do
     scenario 'adds and updates rooms', feature: true, js: true do
-      conference = create(:conference)
-      sign_in create(user)
+
+      sign_in organizer
       visit admin_conference_rooms_path(
                 conference_id: conference.short_title)
 
@@ -43,11 +42,7 @@ feature Room do
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'rooms', :admin
-  end
-
   describe 'organizer' do
-    it_behaves_like 'rooms', :organizer
+    it_behaves_like 'rooms'
   end
 end
diff --git a/spec/features/sponsor_spec.rb b/spec/features/sponsor_spec.rb
index 24998340..79d3fcf0 100644
--- a/spec/features/sponsor_spec.rb
+++ b/spec/features/sponsor_spec.rb
@@ -1,17 +1,16 @@
 require 'spec_helper'
 
 feature Sponsor do
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
-  shared_examples 'sponsors' do |user|
+  shared_examples 'sponsors' do
     scenario 'adds and updates sponsors', feature: true, js: true do
       path = "#{Rails.root}/app/assets/images/rails.png"
-      conference = create(:conference)
+
       conference.sponsorship_levels << create(:sponsorship_level, conference: conference)
-      sign_in create(user)
+      sign_in organizer
 
       visit admin_conference_sponsors_path(
                 conference_id: conference.short_title)
@@ -63,17 +62,15 @@ feature Sponsor do
       # Remove sponsor
       click_link 'Remove sponsor'
       expect(page.all('div.nested-fields').count == 0).to be true
-      click_button 'Update Conference'
+
+      find('button', text: 'Update Conference').trigger('click')
+
       expect(flash).to eq('Sponsorships were successfully updated.')
       expect(page.all('div.nested-fields').count == 0).to be true
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'sponsors', :admin
-  end
-
   describe 'organizer' do
-    it_behaves_like 'sponsors', :organizer
+    it_behaves_like 'sponsors'
   end
 end
diff --git a/spec/features/sponsorship_level_spec.rb b/spec/features/sponsorship_level_spec.rb
index c6f75ce4..229cb926 100644
--- a/spec/features/sponsorship_level_spec.rb
+++ b/spec/features/sponsorship_level_spec.rb
@@ -1,15 +1,14 @@
 require 'spec_helper'
 
 feature SponsorshipLevel do
-# It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
-  shared_examples 'sponsorship levels' do |user|
+  shared_examples 'sponsorship levels' do
     scenario 'adds and updates sponsorship level', feature: true, js: true do
-      conference = create(:conference)
-      sign_in create(user)
+
+      sign_in organizer
       visit admin_conference_sponsorship_levels_path(
                 conference_id: conference.short_title)
       # Add sponsorship level
@@ -36,11 +35,7 @@ feature SponsorshipLevel do
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'sponsorship levels', :admin
-  end
-
   describe 'organizer' do
-    it_behaves_like 'sponsorship levels', :organizer
+    it_behaves_like 'sponsorship levels'
   end
 end
diff --git a/spec/features/supporter_levels_spec.rb b/spec/features/supporter_levels_spec.rb
index ee55a385..692d13ff 100644
--- a/spec/features/supporter_levels_spec.rb
+++ b/spec/features/supporter_levels_spec.rb
@@ -1,17 +1,14 @@
 require 'spec_helper'
 
 feature SupporterLevel do
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:user) { create(:user, role_ids: [organizer_role.id]) }
 
-  shared_examples 'supporter levels' do |user|
+  shared_examples 'supporter levels' do
     scenario 'adds and updates supporter level', feature: true, js: true do
-      conference = create(:conference)
-      sign_in create(user)
-      visit admin_conference_supporter_levels_path(
-                conference_id: conference.short_title)
+      sign_in user
+      visit admin_conference_supporter_levels_path(conference_id: conference.short_title)
 
       # Add supporter level
       click_link 'Add supporter_level'
@@ -43,11 +40,7 @@ feature SupporterLevel do
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'supporter levels', :admin
-  end
-
   describe 'organizer' do
-    it_behaves_like 'supporter levels', :organizer
+    it_behaves_like 'supporter levels'
   end
 end
diff --git a/spec/features/tracks_spec.rb b/spec/features/tracks_spec.rb
index b1ff4925..3d2949e2 100644
--- a/spec/features/tracks_spec.rb
+++ b/spec/features/tracks_spec.rb
@@ -1,15 +1,15 @@
 require 'spec_helper'
 
 feature Track do
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
-  shared_examples 'tracks' do |user|
+  shared_examples 'tracks' do
     scenario 'adds and updates tracks', feature: true, js: true do
-      conference = create(:conference)
-      sign_in create(user)
+
+      sign_in organizer
+
       visit admin_conference_tracks_path(
                 conference_id: conference.short_title)
 
@@ -50,11 +50,7 @@ feature Track do
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'tracks', :admin
-  end
-
   describe 'organizer' do
-    it_behaves_like 'tracks', :organizer
+    it_behaves_like 'tracks'
   end
 end
diff --git a/spec/features/user_spec.rb b/spec/features/user_spec.rb
index 5e5a57df..6a7b12f6 100644
--- a/spec/features/user_spec.rb
+++ b/spec/features/user_spec.rb
@@ -1,14 +1,10 @@
 require 'spec_helper'
+
 feature User do
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
-  let(:admin) { create(:admin) }
 
   shared_examples 'admin ability' do
     scenario 'deletes a user', feature: true, js: true do
-      sign_in(admin)
+      sign_in(create(:admin))
       visit admin_users_path
       expected_count = User.count - 1
       page.all('btn btn-primary btn-danger') do
@@ -20,20 +16,6 @@ feature User do
       end
       sign_out
     end
-    scenario 'can modify roles', feature: true, js: true do
-      @user = create(:user)
-      sign_in(admin)
-      visit admin_users_path
-      find("#user-modify-role-#{@user.id}").click
-      if find("#user-role-selection-#{@user.id}").visible?
-        page.find('#user_role_ids').find(:xpath, 'option[2]').select_option do
-          find('#user_submit_action').click
-          expect(flash).to eq("Updated #{@user.email}")
-          expect(@user.role_ids).to match_array([2])
-        end
-      end
-      sign_out
-    end
   end
 
   describe 'admin' do
diff --git a/spec/features/venue_spec.rb b/spec/features/venue_spec.rb
index 7f2e82a3..ac28a55a 100644
--- a/spec/features/venue_spec.rb
+++ b/spec/features/venue_spec.rb
@@ -1,17 +1,15 @@
 require 'spec_helper'
 
 feature Conference do
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
-
-  shared_examples 'venue' do |user|
+  shared_examples 'venue' do
     scenario 'adds and updates venue' do
-      conference = create(:conference)
 
-      sign_in create(user)
+      sign_in organizer
+
       visit admin_conference_venue_info_path(
                 conference_id: conference.short_title)
 
@@ -59,12 +57,8 @@ feature Conference do
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'venue', :admin
-  end
-
   describe 'organizer' do
-    it_behaves_like 'venue', :organizer
+    it_behaves_like 'venue'
   end
 
 end
diff --git a/spec/features/volunteers_spec.rb b/spec/features/volunteers_spec.rb
index bb82c468..20242781 100644
--- a/spec/features/volunteers_spec.rb
+++ b/spec/features/volunteers_spec.rb
@@ -1,16 +1,13 @@
 require 'spec_helper'
 
 feature Conference do
-  # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
-  let(:admin) { create(:admin) }
-  let(:conference) { create(:conference) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
   shared_examples 'volunteer' do
     scenario 'adds and updates vdays', feature: true, js: true do
-      sign_in(admin)
+      sign_in(organizer)
       visit admin_conference_volunteers_info_path(
         conference_id: conference.short_title)
       check('Enable Volunteering')
@@ -54,7 +51,7 @@ feature Conference do
     end
 
     scenario 'adds and updates vpositions', feature: true, js: true do
-      sign_in(admin)
+      sign_in(organizer)
       visit admin_conference_volunteers_info_path(
         conference_id: conference.short_title)
 
@@ -119,10 +116,6 @@ feature Conference do
     end
   end
 
-  describe 'admin' do
-    it_behaves_like 'volunteer', :admin
-  end
-
   describe 'organizer' do
     it_behaves_like 'volunteer', :organizer
   end
diff --git a/spec/models/ability_spec.rb b/spec/models/ability_spec.rb
index e8a801f2..a95613ba 100644
--- a/spec/models/ability_spec.rb
+++ b/spec/models/ability_spec.rb
@@ -1,39 +1,163 @@
 require 'spec_helper'
-require "cancan/matchers"
+require 'cancan/matchers'
 
-describe "User" do
-  describe "abilities" do
+describe 'User' do
+  describe 'Abilities' do
     subject(:ability){ Ability.new(user) }
+    let!(:first_user) { create(:user) } # automatically becomes admin
     let(:user){ nil }
+    let(:conference_not_public) { create(:conference, make_conference_public: false) }
+    let(:conference_public) { create(:conference, make_conference_public: true)}
+    let(:event_confirmed) { create(:event, state: 'confirmed') }
+    let(:someevent) { create(:event) }
 
-    context "when is an admin" do
-      let!(:user) { create(:admin) }
+    context 'when user is a guest' do  # Test abilities for guest users
 
-      it{ should be_able_to(:manage, Event.new) }
+      it{ should be_able_to(:show, conference_public)}
+      it{ should_not be_able_to(:show, conference_not_public)}
+
+      it{ should be_able_to(:show, event_confirmed)}
+      it{ should_not be_able_to(:show, someevent)}
+
+      it{ should be_able_to(:index, :schedule)}
+
+      it{ should_not be_able_to(:create, Event)}
+      it{ should_not be_able_to(:manage, Event)}
+      it{ should_not be_able_to(:manage, Conference)}
+      it{ should_not be_able_to(:manage, :any)}
     end
 
-    context "when is an participant" do
-      let(:user) { build(:participant) }
+    context 'when user is a Signed In User' do # Test abilities for signed in users (without any role)
+      let(:user) { create(:user) }
+      let(:registration1) { create(:registration, conference: conference_public, user: user) }
+      let(:registration2) { create(:registration, conference: conference_not_public, user: user) }
 
+      it{ should be_able_to(:create, Event) }
+      it{ should be_able_to(:index, Event) }
       it{ should_not be_able_to(:manage, Event.new) }
-      it{ should be_able_to(:create, Event.new) }
-      it{ should be_able_to(:read, Event.new) }
+      it{ should be_able_to(:show, event_confirmed) }
+
+      it{ should be_able_to(:manage, registration1) }
+      it{ should be_able_to(:manage, registration2) }
+
+      it{ should be_able_to(:show, conference_public)}
+      it{ should_not be_able_to(:show, conference_not_public)}
+      it{ should_not be_able_to(:manage, Conference) }
     end
 
-    context "when is an event owner" do
-      let(:user) { create(:participant) }
-      let(:user2) { create(:participant) }
+    context 'user #is_admin?' do
+      let(:user) { create(:admin) }
+      it{ should be_able_to(:manage, User) }
+      it{ should be_able_to(:create, Conference) }
+    end
+
+    context 'signed in users can manage their events' do
+      let(:user) { create(:user) }
+      let(:user2) { create(:user) }
       let(:myevent) { create(:event, users: [user]) }
       let(:someevent) { create(:event, users: [user2]) }
+      let(:commercial_myevent) { create(:commercial, commercialable: myevent) }
+      let(:commercial_someevent) { create(:commercial, commercialable: someevent) }
 
       # Users are able to update and destroy their own events
       it{ should be_able_to(:update, myevent) }
       it{ should be_able_to(:destroy, myevent) }
+      it{ should be_able_to(:manage, myevent) }
+      it{ should be_able_to(:create, myevent.commercials.new) }
+      it{ should be_able_to(:manage, commercial_myevent) }
 
       # Users are not able to update and destroy other users events
       it{ should_not be_able_to(:update, someevent) }
       it{ should_not be_able_to(:destroy, someevent) }
+      it{ should_not be_able_to(:manage, someevent) }
+      it{ should_not be_able_to(:manage, commercial_someevent) }
     end
 
+    context 'when user is an organizer' do
+      let!(:conference1) { create(:conference) }
+      let!(:conference2) { create(:conference) }
+      let(:role) { create(:organizer_role, resource: conference1) }
+      let(:user) { create(:user, role_ids: [role.id]) }
+      let(:someuser) { create(:user) }
+      let(:registration1) { create(:registration, user: someuser, conference_id: conference1.id) }
+
+      it{ should be_able_to(:manage, conference1) }
+      it{ should_not be_able_to(:manage, conference2) }
+      it{ should be_able_to(:manage, registration1) }
+      it{ should be_able_to(:create, Registration) }
+    end
+
+    context 'when user is part of cfp' do
+      let!(:conference1) { create(:conference) }
+      let!(:conference2) { create(:conference) }
+      let(:role) { create(:role, name: 'cfp', resource: conference1) }
+      let(:user) { create(:user, role_ids: role.id) }
+      let(:event) { create(:event, conference_id: conference1.id) }
+      let(:someevent) { create(:event, conference_id: conference2.id) }
+      let(:cfp) { create(:call_for_papers, conference: conference1) }
+
+      it{ should_not be_able_to(:manage, conference1) }
+      it{ should_not be_able_to(:manage, conference2) }
+      it{ should be_able_to(:index, conference1) }
+      it{ should be_able_to(:show, conference1) }
+
+      it{ should be_able_to(:manage, event) }
+      it{ should_not be_able_to(:manage, someevent) }
+
+      it{ should be_able_to(:manage, cfp) }
+      it{ should be_able_to(:manage, create(:event_type, conference: conference1)) }
+    end
+
+    context 'when user has multiple roles' do
+      let!(:conference1) { create(:conference) } # user is organizer
+      let!(:conference2) { create(:conference) } # user is cfp
+      let!(:conference3) { create(:conference) } # user is info_desk
+      let!(:conference4) { create(:conference) } # user is volunteer coordinator
+      let!(:conference5) { create(:conference, make_conference_public: true) } # user has no role
+      let!(:conference6) { create(:conference, make_conference_public: false) } # user has no role
+      let(:role_organizer) { create(:role, name: 'organizer', resource: conference1) }
+      let(:role_cfp) { create(:role, name: 'cfp', resource: conference2) }
+      let(:role_info_desk) { create(:role, name: 'info_desk', resource: conference3) }
+      let(:role_volunteer_coordinator) { create(:role, name: 'volunteer_coordinator', resource: conference4) }
+      let(:user) { create(:user, role_ids: [role_cfp.id, role_organizer.id, role_cfp.id, role_info_desk.id, role_volunteer_coordinator.id]) }
+      let(:admin) { create(:admin) }
+
+      it{ should be_able_to(:manage, conference1) }
+      it{ should_not be_able_to(:update, conference2) }
+      it{ should_not be_able_to(:update, conference3) }
+      it{ should_not be_able_to(:update, conference4) }
+      it{ should_not be_able_to(:update, conference5) }
+
+      it{ should be_able_to(:show, conference1) }
+      it{ should be_able_to(:show, conference2) }
+      it{ should be_able_to(:show, conference3) }
+      it{ should be_able_to(:show, conference4) }
+      it{ should be_able_to(:show, conference5) }
+      it{ should be_able_to(:show, conference6) }
+
+      it{ should be_able_to(:manage, conference1.venue) }
+      it{ should_not be_able_to(:manage, conference2.venue) }
+      it{ should_not be_able_to(:manage, conference3.venue) }
+      it{ should_not be_able_to(:manage, conference4.venue) }
+      it{ should_not be_able_to(:manage, conference5.venue) }
+
+      it{ should be_able_to(:manage, conference1.registrations.new) }
+      it{ should_not be_able_to(:manage, conference2.registrations.new) }
+      it{ should be_able_to(:manage, conference3.registrations.new) }
+      it{ should_not be_able_to(:manage, conference4.registrations.new) }
+      it{ should_not be_able_to(:manage, conference5.registrations.new) }
+
+      it{ should be_able_to(:manage, conference1.events.new) }
+      it{ should be_able_to(:manage, conference2.events.new) }
+      it{ should_not be_able_to(:manage, conference3.events.new) }
+      it{ should_not be_able_to(:manage, conference4.events.new) }
+      it{ should_not be_able_to(:manage, conference5.events.new) }
+
+      it{ should be_able_to(:manage, Question.new(conference_id: conference1.id)) }
+      it{ should_not be_able_to(:manage, Question.new(conference_id: conference2.id)) }
+      it{ should be_able_to(:manage, Question.new(conference_id: conference3.id)) }
+      it{ should_not be_able_to(:manage, Question.new(conference_id: conference4.id)) }
+      it{ should_not be_able_to(:manage, Question.new(conference_id: conference5.id)) }
+    end
   end
 end
diff --git a/spec/models/conference_spec.rb b/spec/models/conference_spec.rb
index e3897702..4336ef80 100644
--- a/spec/models/conference_spec.rb
+++ b/spec/models/conference_spec.rb
@@ -273,10 +273,9 @@ describe Conference do
   end
 
   describe '#get_top_submitter' do
-    # It is necessary to use bang version of let to build roles before user
-    let!(:organizer_role) { create(:organizer_role) }
-    let!(:participant_role) { create(:participant_role) }
-    let!(:admin_role) { create(:admin_role) }
+    let!(:conference) { create(:conference) }
+    let!(:organizer_role) { create(:organizer_role, resource: conference) }
+    let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
     it 'calculates correct hash with top submitters' do
       event = create(:event, conference: subject)
@@ -307,7 +306,7 @@ describe Conference do
       target = build(:target, target_count: 10, unit: Target.units[:registrations])
       subject.targets = [target]
       result = {
-          "10 Registrations by #{target.due_date}" => '0'
+        "10 Registrations by #{target.due_date}" => '0'
       }
       expect(subject.get_targets(Target.units[:registrations])).to eq(result)
     end
@@ -317,7 +316,7 @@ describe Conference do
       subject.targets = [target]
       subject.registrations = [create(:registration)]
       result = {
-          "10 Registrations by #{target.due_date}" => '10'
+        "10 Registrations by #{target.due_date}" => '10'
       }
       expect(subject.get_targets(Target.units[:registrations])).to eq(result)
     end
@@ -330,7 +329,7 @@ describe Conference do
       target = build(:target, target_count: 10, unit: Target.units[:submissions])
       subject.targets = [target]
       result = {
-          "10 Submissions by #{target.due_date}" => '0'
+        "10 Submissions by #{target.due_date}" => '0'
       }
       expect(subject.get_targets(Target.units[:submissions])).to eq(result)
     end
@@ -340,7 +339,7 @@ describe Conference do
       subject.targets = [target]
       subject.events = [create(:event)]
       result = {
-          "10 Submissions by #{target.due_date}" => '10'
+        "10 Submissions by #{target.due_date}" => '10'
       }
       expect(subject.get_targets(Target.units[:submissions])).to eq(result)
     end
@@ -349,7 +348,7 @@ describe Conference do
       target = build(:target, target_count: 300, unit: Target.units[:program_minutes])
       subject.targets = [target]
       result = {
-          "300 Program minutes by #{target.due_date}" => '0'
+        "300 Program minutes by #{target.due_date}" => '0'
       }
       expect(subject.get_targets(Target.units[:program_minutes])).to eq(result)
     end
@@ -359,7 +358,7 @@ describe Conference do
       subject.targets = [target]
       subject.events = [create(:event)]
       result = {
-          "300 Program minutes by #{target.due_date}" => '10'
+        "300 Program minutes by #{target.due_date}" => '10'
       }
       expect(subject.get_targets(Target.units[:program_minutes])).to eq(result)
     end
@@ -896,10 +895,9 @@ describe Conference do
   end
 
   describe 'self#event_distribution' do
-    # It is necessary to use bang version of let to build roles before user
-    let!(:organizer_role) { create(:organizer_role) }
-    let!(:participant_role) { create(:participant_role) }
-    let!(:admin_role) { create(:admin_role) }
+    let!(:conference) { create(:conference) }
+    let!(:organizer_role) { create(:organizer_role, resource: conference) }
+    let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
     it 'self#event_distribution calculates correct values with user' do
       create(:user, last_sign_in_at: Date.today - 3.months) # active
@@ -1426,9 +1424,9 @@ describe Conference do
   describe '#user_registered?' do
 
     # It is necessary to use bang version of let to build roles before user
-    let!(:organizer_role) { create(:organizer_role) }
-    let!(:participant_role) { create(:participant_role) }
-    let!(:admin_role) { create(:admin_role) }
+    let!(:conference) { create(:conference) }
+    let!(:organizer_role) { create(:organizer_role, resource: conference) }
+    let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
     let(:user) { create(:user) }
 
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index ffbcb1c4..be110312 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -3,66 +3,51 @@ require 'spec_helper'
 describe User do
 
   # It is necessary to use bang version of let to build roles before user
-  let!(:organizer_role) { create(:organizer_role) }
-  let!(:participant_role) { create(:participant_role) }
-  let!(:admin_role) { create(:admin_role) }
-  let!(:admin) { create(:user) }
+  let!(:user_admin) { create(:user) }
+  let!(:admin) { create(:admin) }
+  let!(:participant) { create(:user) }
+  let!(:conference) { create(:conference) }
+  let!(:organizer_role) { create(:organizer_role, resource: conference) }
+  let!(:cfp_role) { create(:cfp_role, resource: conference) }
+  let!(:organizer) { create(:user, role_ids: [organizer_role.id]) }
 
   it 'returns the correct role' do
-    participant = create(:user, email: 'participant@example.de')
-    expect(admin.roles.first).to eq(admin_role)
-    expect(participant.roles.first).to eq(participant_role)
+    expect(user_admin.is_admin).to eq(true)
+    expect(organizer.roles.first).to eq(organizer_role)
   end
 
   it 'returns the correct roles' do
-    roles = [organizer_role.id, participant_role.id, admin_role.id]
-    user_with_all_roles = create(:user, email: 'participant@example.de')
-    user_with_all_roles.role_ids = roles
-    user_with_all_roles.save
+    roles = [organizer_role.id, cfp_role.id]
+    another_user = create(:user, email: 'participant@example.de')
+    another_user.role_ids = roles
+    another_user.save
 
-    expect(user_with_all_roles.roles.length).to eq(3)
-    expect(user_with_all_roles.roles[0]).to eq(participant_role)
-    expect(user_with_all_roles.roles[1]).to eq(organizer_role)
-    expect(user_with_all_roles.roles[2]).to eq(admin_role)
+    expect(another_user.roles.length).to eq(2)
+    expect(another_user.roles[0]).to eq(organizer_role)
+    expect(another_user.roles[1]).to eq(cfp_role)
   end
 
-  describe '#role?' do
+  describe '#has_role?' do
     shared_examples '#role?' do |user, role, expected|
       it "returns #{expected} for #{role}" do
-        user_obj = create(user, email: 'e@example.com')
-        expect(user_obj.role?(role)).to be expected
-        expect(user_obj.role?(role.downcase)).to be expected
-        expect(user_obj.role?(role.upcase)).to be expected
-        expect(user_obj.role?(role.downcase.capitalize)).to be expected
-      end
-    end
-
-    context 'admin' do
-      it_behaves_like '#role?', :admin, 'orgAnizer', false
-      it_behaves_like '#role?', :admin, 'adMin', true
-      it_behaves_like '#role?', :admin, 'partiCipant', false
-
-      it 'assigns first user admin role' do
-        expect(admin.role?('Admin')).to be true
-        expect(admin.role_ids).to match_array([admin_role.id])
-      end
-    end
-
-    context 'participant' do
-      it_behaves_like '#role?', :participant, 'orgAnizer', false
-      it_behaves_like '#role?', :participant, 'adMin', false
-      it_behaves_like '#role?', :participant, 'partiCipant', true
-
-      it 'assigns second user participant role' do
-        participant = create(:user, email: 'participant@example.de')
-        expect(participant.role_ids).to match_array([participant_role.id])
+        user_obj = create(user)
+        expect(user_obj.has_role?(role.downcase, conference)).to be expected
       end
     end
 
     context 'organizer' do
-      it_behaves_like '#role?', :organizer, 'orgAnizer', true
-      it_behaves_like '#role?', :organizer, 'adMin', false
-      it_behaves_like '#role?', :organizer, 'partiCipant', false
+      it_behaves_like '#role?', :organizer, 'organizer', true
+      it_behaves_like '#role?', :organizer, 'participant', false
+    end
+
+    context 'admin' do
+      it 'assigns first user admin role' do
+        expect(User.first.is_admin).to be true
+      end
+    end
+
+    context 'participant' do
+      it_behaves_like '#role?', :user, 'adMin', false
     end
   end
 end
diff --git a/spec/support/sidebar.rb b/spec/support/sidebar.rb
index 4c730a97..cfa0285e 100644
--- a/spec/support/sidebar.rb
+++ b/spec/support/sidebar.rb
@@ -2,7 +2,7 @@ module Sidebar
   def sidebar
     @conference = create(:conference)
     assign :conference, @conference
-    render 
+    render
     expect(view).to render_template('admin/conference/_sidebar')
   end
 end
diff --git a/spec/views/admin/conference/edit.html.haml_spec.rb b/spec/views/admin/conference/edit.html.haml_spec.rb
index 713956d2..44d2cc1a 100644
--- a/spec/views/admin/conference/edit.html.haml_spec.rb
+++ b/spec/views/admin/conference/edit.html.haml_spec.rb
@@ -3,7 +3,7 @@ require 'spec_helper'
 describe 'admin/conference/edit' do
 
   it 'renders conference details which are editable' do
-    @conference = create(:conference, title: 'OpenSUSE')
+    @conference = create(:conference, title: 'openSUSE')
     assign :conference, @conference
     render template: 'admin/conference/edit.html.haml'
     expect(rendered).to include('OpenSUSE')
diff --git a/spec/views/admin/conference/index.html.haml_spec.rb b/spec/views/admin/conference/index.html.haml_spec.rb
index 0d237a7c..99280fd0 100644
--- a/spec/views/admin/conference/index.html.haml_spec.rb
+++ b/spec/views/admin/conference/index.html.haml_spec.rb
@@ -2,9 +2,9 @@ require 'spec_helper'
 
 describe 'admin/conference/index' do
   it 'renders all conference names with links' do
-    assign(:conferences, [create(:conference, title: 'OpenSUSE'), create(:conference)])
+    assign(:conferences, [create(:conference, title: 'openSUSE'), create(:conference)])
     render
-    expect(rendered).to include('OpenSUSE')
-    expect(rendered).to include("The dog and pony show")
+    expect(rendered).to include('openSUSE')
+    expect(rendered).to include('The dog and pony show')
   end
 end
diff --git a/spec/views/admin/conference/roles.html.haml_spec.rb b/spec/views/admin/conference/roles.html.haml_spec.rb
new file mode 100644
index 00000000..0223cf4c
--- /dev/null
+++ b/spec/views/admin/conference/roles.html.haml_spec.rb
@@ -0,0 +1,26 @@
+require 'spec_helper'
+
+describe 'admin/conference/roles' do
+  let(:conference) { create(:conference) }
+  let(:organizer_role) { create(:organizer_role, description: 'My description for organizer role', resource: conference) }
+  let(:organizer) { create(:user, name: 'test name', email: 'test@email.com', role_ids: [organizer_role.id]) }
+
+  it 'renders the roles template for the conference' do
+    assign :conference, conference
+    assign :selection, 'organizer'
+    assign :role, [organizer_role]
+    assign :role_users, 'organizer' => [organizer]
+    render
+    expect(rendered).to include('Show users for role:')
+    expect(rendered).to include(organizer_role.description)
+    expect(rendered).to include("Add role 'Organizer' to user:")
+    expect(rendered).to include('Add role')
+    expect(rendered).to include('Users with role Organizer')
+    expect(rendered).to have_selector("table thead th:nth-of-type(1)", text: 'ID')
+    expect(rendered).to have_selector("table thead th:nth-of-type(2)", text: 'Name')
+    expect(rendered).to have_selector("table thead th:nth-of-type(3)", text: 'Email')
+    expect(rendered).to have_selector("table tbody tr:nth-of-type(1) td:nth-of-type(1)", text: organizer.id)
+    expect(rendered).to have_selector("table tbody tr:nth-of-type(1) td:nth-of-type(2)", text: 'test name')
+    expect(rendered).to have_selector("table tbody tr:nth-of-type(1) td:nth-of-type(3)", text: 'test@email.com')
+  end
+end
diff --git a/spec/views/admin/conference/show.html.haml_spec.rb b/spec/views/admin/conference/show.html.haml_spec.rb
index fa747370..383af195 100644
--- a/spec/views/admin/conference/show.html.haml_spec.rb
+++ b/spec/views/admin/conference/show.html.haml_spec.rb
@@ -3,7 +3,7 @@ require 'spec_helper'
 describe 'admin/conference/show' do
 
   it 'renders conference dashboard' do
-    conference = create(:conference, title: 'OpenSUSE')
+    conference = create(:conference, title: 'openSUSE')
     assign :conference, conference
     assign :conference_progress, conference.get_status
     render
diff --git a/spec/views/admin/eventtypes/index.html.haml_spec.rb b/spec/views/admin/event_types/index.html.haml_spec.rb
similarity index 89%
rename from spec/views/admin/eventtypes/index.html.haml_spec.rb
rename to spec/views/admin/event_types/index.html.haml_spec.rb
index 095ebf93..661f7156 100644
--- a/spec/views/admin/eventtypes/index.html.haml_spec.rb
+++ b/spec/views/admin/event_types/index.html.haml_spec.rb
@@ -1,6 +1,6 @@
 require 'spec_helper'
 
-describe 'admin/eventtypes/index' do
+describe 'admin/event_types/index' do
 
   it 'renders event types' do
     @event_type = create(:event_type)
diff --git a/spec/views/admin/social_events/index.html.haml_spec.rb b/spec/views/admin/social_events/index.html.haml_spec.rb
index 650828a2..a95ec30e 100644
--- a/spec/views/admin/social_events/index.html.haml_spec.rb
+++ b/spec/views/admin/social_events/index.html.haml_spec.rb
@@ -2,7 +2,7 @@ require 'spec_helper'
 
 describe 'admin/social_events/index' do
 
-  it 'renders social events' do 
+  it 'renders social events' do
     @social_event = create(:social_event)
     assign :conference, @social_event.conference
     render
diff --git a/spec/views/admin/volunteers/show.html.haml_spec.rb b/spec/views/admin/volunteers/show.html.haml_spec.rb
index 25646308..b322f996 100644
--- a/spec/views/admin/volunteers/show.html.haml_spec.rb
+++ b/spec/views/admin/volunteers/show.html.haml_spec.rb
@@ -1,5 +1,5 @@
 require 'spec_helper'
 
-describe "admin/volunteers/show" do
+describe 'admin/volunteers/show' do
   pending "add some examples to (or delete) #{__FILE__}"
 end
diff --git a/spec/views/conference/show.html.haml_spec.rb b/spec/views/conference/show.html.haml_spec.rb
index e1d11cb7..cdc1db3a 100644
--- a/spec/views/conference/show.html.haml_spec.rb
+++ b/spec/views/conference/show.html.haml_spec.rb
@@ -68,8 +68,8 @@ describe 'conference/show.html.haml' do
     expect(view).to render_template('conference/_social_media')
     expect(view.content_for(:splash)).to include('http://www.fbexample.com')
     expect(view.content_for(:splash)).to include('http://www.google-example.com')
-    expect(view.content_for(:splash)).to include("http://instagram.com")
-    expect(view.content_for(:splash)).to include("http://twitter.com")
+    expect(view.content_for(:splash)).to include('http://instagram.com')
+    expect(view.content_for(:splash)).to include('http://twitter.com')
   end
 
   it 'renders location partial' do