Chat night has been on Sunday nights. With the chat room back again, Sunday nights seems to be the night that I find the most members on.
The mods and I have been kicking out ghosts as we see them. Be sure to click on the red button in the top right of the chat window (don't just close the chat browser window) to log out correctly. Merely closing your browser window does not log you out of chat properly and you'll leave a "ghost", which will have to be kicked before you can log in again.