typo

app/views/sidebar.html

             </div>
 
             <div ng-hide="isInState('rooms')">
-                <span>Is there people here?</span>
+                <span>Are there people here?</span>
                 <md-button class="md-primary md-group-button col-xs-12" ui-sref="rooms">
                     Show all rooms
                 </md-button>