Marcel's
Marcel's, web site, 2401 Pennsylvania Avenue NW, Washington, DC, 202-296-1166, dinner only (Metro Trip Planner - opens in new window) [Economist | Washingtonian | WaPo | City Paper | food-plan | Don Rockwell | flyertalk | openlist | Yelp | Gayot]
Belgian, mostly, more classic than nouvelle. All the reviews are good, but hard to see it beating a trip to Europe.