I walked by once when the door was open and nobody was really around... I assume someone was inside, but I don't know. I almost peeked in but decided against it.
Years ago, my friend's dad would take us to some games (in the 80's) and we'd always end up on the Quad at a tailgate beforehand. I don't know what frat he was in, but he told us that he'd been in the top of it several times when in school... for either some weird frat tradition type thing or a hazing deal. He'd never give us details, sworn to secrecy he'd say... which as a kid, only drove my curiosity. I'm pretty sure he was in the UA SGA too, as he ended up Lt. Governor of AL.