I am normally up till at least 3am every night. Of course, I don't tend to roll out of bed very early as compensation.....
BTW, the chat system has been modded so that a numeric display will appear in the menu bar at the top of the screen showing how many members are currently in the chat room. Bear in mind, however, that it may not actually be in "real time". If someone closes the window for the site without actually logging out of the chat, it may appear that they are still there when that will not be true. Nothing much, programmatically, can be done about that issue, but I guess it is better than nothing.