I'd be more than willing to go to a group Brewer's game. I bought a 20 pack this year, so between going to the games and racing, I'll be spending many hours in those fine parking lots.
Seriously though, a group Brewers game would not be a bad idea at all for a non-racing Sunday. The bleacher seats are actually really good, better than the 400 level seats. It would be a fun event. We could bring the bus, too! Does Milwaukee Region have an advertising budget...? 
It's going to an interesting season...