See, I love B-Dubs (as we call it). That's where we always go to watch Purdue games. I can't stand going there for NFL games though. For some reason, there are a a bunch of obnoxious Bears fans that are always there yelling and just generally acting like jackasses.
I'll bet every dive bar and restaurant will be packed for the game. Wherever you end up at, there should be a good atmosphere.