Not great burgers, but better-than-usual-for-lunchtime burgers: Tony's Burger, on 32 bewteen Park and Madison. Juicy, decent bacon and plenty of it, abundance of fries, and they know what "medium-rare" means. Prime-Burger, 51st (I think) east of Fifth. Smallish burgers that are taste-filled, but you might need two, or at least a plate of fries. The Coke is just syrupy enough (meaning, more syrupy than most people like).