Bacchus, web site, 1827 Jefferson Place NW, Washington, DC, 202-785-0735, closed Sundays. A bit south of Dupont Circle, doesn’t open for dinner until 6:00. There is also a branch in Bethesda: 7945 Norfolk Avenue, Bethesda, MD, 301-657-1722 (Metro Trip Planner – opens in new window) [Washingtonian | WaPo | City Paper | food-plan | openlist | Yelp | Gayot]
Traditionally it has been the area’s ruling Lebanese restaurant. Very good on all counts, especially the appetizers. I love the chicken in yogurt sauce with pomegranate seeds. Not cheap, but worth it, this restaurant is a favorite for many people.
Update: Now closed.