Les Halles
Les Halles, web page, 1201 Pennsylvania Avenue NW, Washington, DC, 202-347-6848, open 11:30 to midnight, every day. (Metro Trip Planner - opens in new window) [Washingtonian | WaPo | City Paper | Don Rockwell | openlist | Yelp | Gayot]
A good French steakhouse, with the onglet as the entree of pride. Not cheap, but a real treat. Also get the mashed potatoes with gravy, as well as the Creme Brulee for desert. The best French Fries in town as well. Consistent.