anchor.diff:        <div class="card">
           <% sessionList.each do |session| %>
             <div class="card-header striped-outer" id="session-header-<%= session.id %>">
  -            <h2 class="mb-0">
  -              <button class="btn btn-link" type="button" data-toggle="collapse" data-target="#session-<%= session.id %>" aria-expanded="false" aria-controls="session-<%= session.id %>">
  -                <%= session.name %>: <%= session.timeslot %>
  -              </button>
  -            </h2>
  -          </div>
  +            <div class="row mb-0">
  +              <div class="col-md-5">
  +                <button class="btn btn-link" type="button" data-toggle="collapse" data-target="#session-<%= session.id %>" aria-expanded="false" aria-controls="session-<%= session.id %>">
  +                  <%= session.name %>: <%= session.timeslot %>
  +                </button>
  +              </div>
  +              <div class="col-md-1 no-pad"></div>
  +              <div class="col-md-2 no-pad ">
  +              <span class="text-primary"><%= session.total_max_players - session.players_count %>
  +                of <%= session.total_max_players %> player seats left</span></div>
  +
  +              <% if session.gm_count == session.total_gms_needed %>
  +                <% klass = 'text-primary' %>
  +              <% else %>
  +                <% klass = 'text-danger' %>
  +              <% end %>
  +              <div class="col-md-2 no-pad"></div>
  +              <div class="col-md-2 no-pad"><span class="<%= klass %>"><%= session.total_gms_needed - session.gm_count %>
  +                of <%= session.total_gms_needed %> GMs needed</span>
  +              </div>
  +            </div>
  +          </div>
  +
   
             <div id="session-<%= session.id %>" class="collapse" aria-labelledby="session-header-<%= session.id %>" data-parent="#session-signup">
               <div class="card-body">
  
positive.code:           </div>
          <% end %>
        </div>
      </div>
    <% end %>  
    <hr>
  
    <% if @registration %>
  
negative.code:     <%= button_to 'Edit', edit_event_path(@event), :class => 'btn btn-primary', :method => :get %>
    <% end %>
    <%= button_to 'Back', events_path, :class => 'btn btn-success', :method => :get %>
    </div>
  