Chinatown is a fun place to just walk around. So is South Street, and some of the stuff in old city. A cheesesteak tour, perhaps? The sports arenas are right there, and so is the Zoo and art museum. If you don't mind driving a little out of the city, Manayunk has some good bars and restaraunts (a little down 76 by Route 1).
As for restaraunts, try Monk's (
http://www.monkscafe.com/) the Capital Grille, Fogo de Chao, or really almost anything.