Pretty solid bet it Black & Orange, the burgers are meh, but as a quick place to eat, you walk right in and place your order and sit. Every time I've gone it hasn't taken long to get my food. Also tried the Brixton, not so bad, but it was rammed when I was in there, getting a beer is a bitch.
EDIT: Chix has some decent chicken, it's not at all the best Peruvian chicken I've had, but we were walking by and wanted chicken. It worked out. I believe it's on 11th between U and V. Anyone tried Tacos El Chilango? It's on V between 11 and 12, but every time I go by it's closed :\