Because of the way the apartments are, and there aren't any shared living areas like what you may get in University dorms, their could be some common room areas? I'd imagine there'd be food courts on the campus too, so those would be cool places to hang out in.
Besides, individual rooms will make sleepovers all the more fun! :D

By the way, if the GM's would like, I'd be more than happy to create a little diagram to show who is living next to who on whatever floor of the building. And even a map of the campus, if you'd like? That way people will know if certain things are actually on the campus, and have a scale of how big it is. :)