We made sure to get tickets to see the Philadelphia Phillies play, although I would have rather seen a pro football game, but the stadium was amazing. We saw the Phillies play the Pirates, and danced to all the songs during the seventh-inning stretch.
The only bad thing about the experience was discovering that Philly isn't the City of Brotherly Love after all. Folks in the parking lot were getting very upset, and not being patient at all. One guy just rammed another car because they didn't let him go. Hmmm. Road rage, definitely.
Other than me not liking baseball very much, this was a cool thing to do on our trip.