From a trip the week before last, we had
excellent meals at
--
Mie N Yu on M St. in Georgetown
--
Rosa Mexicano (near MCI Center)
--
Kinkead's 2000 Penn (Foggy Bottom)
I would not call any of these "fine dining", but all had really great ambiance, and REALLY, REALLY outstanding food (priced accordingly [as in "fairly high"]).
We also had dinner at 1789 in Georgetown, which for us as a major disapointment: Very spotty, erratic service; only very good (not truly memorable) food. Definitely NOT worth the expense from our viewpoint.