There's a sleeper joint called Tribeca Cornerstone Grill on Greenwich St. in Tribeca. It's so sleeper, that they don't even have tables. But for my money, some of the best chicken you can get. I recommend lemon garlic wings, comes with a side of Pita.
Mudville 9 is a great option as Sreekesh pointed out. I'd also check out the Bon Chon on 32nd St.