WI:
New Glarus. Self-guided, high-tech automation for a craft brewery)
Lakefront. A bit zany and fun.
Miller. It's free and interesting, especially if you go during production during the week.
MN: Surly
IL: Not too sure. Half Acre, Goose Island?
IN: 3 Floyds. I know you didn't say Indiana, but if you're in Chicago, it's like 30 minutes away.