I don't really hit up many day games during the week at all, so I'll let the others advice guide you. I'd second the call for Lou Malnati's for some deep dish. As a warning, unless you have a bleacher seat, you can't get into the bleachers. You can bring any food or non-alcoholic drink in, so if you're looking to save money, don't hesitate to do that. Wrigley's food isn't much to miss out on. If you are planning parking on the street though, give yourself some extra time, as you may have to circle the mile radius a bit before finding a spot. There are countless bars in the neighborhood if you're looking for that after the game. Hard to go wrong with one of them. Obvious, but just make sure you're heading the right way on the Red Line, otherwise you'll wind up in White Sox country.