I am looking to go out to eat tonight and I know that many restaurants offer good deals on Tuesdays. If Paul (11th and Pine) didn't close, I'd be going there tonight.
Aside from any general recommendations for Tuesday dining bargains, perhaps people can post dining deals on this thread?
Bourbon Blue in Manayunk has AYCE ribs, crab legs, and old bay fries for $21 every Wednesday. The crabs legs are okay, but the ribs were surprisingly tender and delicious.