Hey,
This is not your suggestion, but a request for help.
Want an online user counter, if you are a visitor you can google that there are several different ones to use, or this one here. Once the link is generated, you will add it to your room edit.
then you must choose "RevolverMaps" clicking in "select special code..."
you also can define Width and height;
in full embeded code, you must put the code of REVOLVERMAPS, click here to go to Revolvermaps web.
clicking on menu "get a widget" you can get the code to the special code.
after doing all that, just go to your chat edit and in tabs, you create a tab and paste the generated code in space in blank.
Here you add the generated link and then click save.