Don't update the game list when it isn't visible (i.e. you're already in a game). The client will refresh it when the player leaves their game anyway. This will hopefully cut down on a lot of bandwidth usage -- that's a lot of data sent around whenever anybody joins or leaves any game, and nobody sees it.

WebContent/js/cah.gamelist.js

@@ -80,8 +80,10 @@ cah.GameList.prototype.hide = function() {
  * Query the server to update the game list.
  */
 cah.GameList.prototype.update = function() {
+  if ($(this.element_).is(":visible")) {
     // TODO display a loading indicator of some sort
     cah.Ajax.build(cah.$.AjaxOperation.GAME_LIST).run();
+  }
 };
 
 /**