Well... you could check out the books and comics on the media deck. They're pretty much all bad except maybe the informative things like medical textbooks and cookbooks. The theatrical deck has all kinds of stage props and art supplies. There's gym equipment and a pool on the recreational deck.

...There is also a weapons deck, but since there's almost never any monsters around there's not much use for that stuff. Unless you're suicidal. The nature deck a good place for quiet. Just... don't annoy the panda. Or any other wildlife you happen to find there.

[No, he's actually not going to warn you about the Servo deck. Not that it needs much warning anymore with the Servos actually being helpful as long as you don't actively harm or offend any of them. Why Tom made so many copies of himself, Roxas isn't sure he wants to know.]