The Rochester (New York) Red Wings, the Minnesota Twins minor league club, offers a good afternoon or night out at the baseball field. Frontier Field offers probably the best view of the Rochester skyline and the concession stands are above average, offering a wide array of local food options. As for the team, it is consistently good (the Brewers have a great farm system), and fan-friendly. The fans' response is awesome, which is seen by the fact that evening games are frequently very full. In short, if you are looking for a nice minor league ballgame, the Red Wings are a very good bet.
Sadly, a lot of games are played in the afternoon and hard to catch for the working crowd.