I think he meant more en masse. For the OP he'd need to look at every chapter on his campus individually and find out, but there probably isn't a way to make a complete overall list without going to each national website and checking one by one either.
Unless you know, someone else on GC's done it before.
__________________
From the SigmaTo the K!
Polyamorous, Pansexual and Proud of it! It Gets Better