Yes, I know it gives me a 5-minute penalty before I can try to join another lobby, and that it's a horrible unsportsmanlike thing to do.
But the only way I can figure out how to do it is to close the entire application and re-launch. Is there no better way to quit a lobby than this?
(I'm trying to play with a friend and the chat system is down, so every 5 minutes we're joining at the same time in hopes that we get lucky...)