I'm playing a custom dorm, and so far everything was working. I just now noticed the dormies won't come out of their rooms. They all claimed doors, and now they stand in there and don't do anything. There's a thought bubble with the "fun" symbol, so I tried the "make all happy" cheat and giving them bookcases... nothing. Has this happened to anyone? (I know, I know. 50/50 method. I'm at it. But if someone knows something before I spent the day moving downloads, that would be awesome.)

Dormies don't do anything in their rooms. They just stay and recover energy. If they don't go out, there is something or someone what is blocking their path. Enter build mode and try move their door one tile right or left.

Every dormie? Unlikely...

I've removed my downloads now anyway and without CC they do. So I guess if no one can jump in and say it's like, a known issue with this and that hack I guess I know how I'm spending my evening.

A pic of your dorm and room setup would be helpful.