From my understanding "the quad" is under a full-blown renovation. The quad is expected to be closed for two years while housing has provided off-campus apartments as a substitute for fraternity housing. It's going to be very strange during football season without all the action on that side of campus -- no place to sit and rest on the walk back to the east side of campus!
Mainly sophomore members live in the fraternity dorms, but that varies from chapter to chapter. Some of the larger fraternities occupy three floors of one building and either strongly encourage older brothers to live on the hall or they must allow independants to fill up the empty rooms.
Greeks are a little nervous about the atmosphere (or lack of) that this will cause in the fall without the strong presence of the fraternities on campus but honestly those poor boys deserve better living conditions! I have to say that I think this might help revatilize some of the fraternities because this will be one of the nicest/newest places for guys to live on campus.