osem-fcy/app/views/admin/rooms/index.html.haml

.row
  .col-md-8
    = semantic_form_for(@conference, :url => admin_conference_room_path(@conference.short_title, @conference.rooms)) do |f|
      = dynamic_association :rooms, "Rooms", f
      = f.action :submit, :as => :button, :button_html => {:class => "btn btn-primary"}