On July 6, Milwaukee welcomes The Black Keys. Opening for the Black Keys will be two other "alternative" bands. Cage the Elephant will start the show, followed up with Florence and The Machine. This is a bargain show, when you compare prices to other Marcus Amp. events. It will cost a mere $17.50 to get through the gates. Don't forget, that price includes admission to the Summerfest grounds. Better seats will set you back around $30, plus those famous fees. From what I read, the cheap seats are around $40 total.