Take the red line to Dupont Circle, and walk a couple of blocks to OBELISK
2029 P St., NW 202-872-1180. Now I'm going to have to duck, but you noted you're from Chicago, and DC restaurants are a pale imitation.

It's possible Obelisk isn't open on Sundays. They also own the pizza place next door, which is, and which is very good. BUT the waiters have a terrible attitude problem.

In any event, there are a bunch of fun, and also some upscale places, in the Dupont Circle area. Well worth a visit. Don't miss Kramer books (http://www.kramers.com/) afterwards.