Actually, I'm none to sure about how to put a chat box on this site. And it's up to Anima more than it is to me, about whether we add a chat box or not.
Fortunately this is a forumotion hosted site, and they actually come with a built in chatbox. So if you do decide on adding one, you simply have to go to the administration panel --> (Modules) --> (Chatbox) Configuration --> Select yes where it says "activate the chatbox" and then decide whether you want it on the top or bottom of the page.