The windows were still open after the RC. We played there a lot in 72-76 with no lights, only natural light.
I remember keggers in there with bands and 50-cent beers; going down those back stairs to the bathroom was a challenge. They used to have post-game Homecoming parties there too, when we played at City Stadium.
The old University Student Union did a great job of providing non-fraternity entertainment, ie Greek Theatre parties, parties on the quad between Moore and Freeman, and over on the pre-turfed Keller Hall Field. Allison Jones Vogler of the Spider Club and the late Brian Marth were very active in that group.