I like the boardwalk pizza and pasta too, forgot to mention it, since it's been closed for so long. Last time I was in DCA, I wanted to try Pym's and the Shwarma, so didn't get a chance to go back to the boardwalk pizza. hopefully it's as good as before.
Award Weiners is good too for a quick meal and pricing is reasonable, the seating there though is kinda weird (it wraps around the entrance and exit to the Philharmagic show).