Johnnys Half Shell
Johnny’s Half Shell, web site, 2002 P Street NW, Washington, DC, 202-296-2021, closed Sunday (Metro Trip Planner - opens in new window) [Economist | Washingtonian | WaPo | City Paper | food-plan | openlist | Yelp | Gayot]
Supposed to be the best place in DC for crabs, clams, and the like. I went once, it did not thrill me.
UPDATE: Now moved to 400 North Capitol St., Montsouris is in the old location on P Street NW