I've had a couple of people ask, which means there are more who don't know.
Any night that a single room is booked counts as a room night. If someone gets a hotel room for Thursday through Sunday, that's 3 room nights.
So if we get 11 people who are coming to the Con to book their room for Thursday through Sunday, we're in a little bit better shape. If those folks come in early or stay later, that's even better!
Solomon