Group Therapy is a standard thing. I was in the hospital last year for about a month and we had 4 groups during the day. If you don't feel like talking in the groups you don't have to they don't force you to talk.

As for the MP3 player that's different with each hospital I've been in several and each is different on their rules. The one I will have to go to if my pdoc wants to hospitalize me for the same reason as you says you can have one but only listen to it if staff can see you. The same goes for room mates. Most of the hospitals I've been in I have a room mate.

Jbug