I haven't heard of any of the bands, but the beer list looks good: http://www.penumbrabeerbash.com/#music
Dang-the beer list looks great, but, while I haven't heard of any of the bands either, their names, photos, and descriptions give me the impression that having to listen to them would make for a pretty unpleasant evening. Pass.
If a few unpleasantries kept me from the things I truly love I would have never had a girlfriend let alone a wife!