Just about any cuisine you can imagine is available in Washington, and there are literally hundred of restaurants to try out that will suit almost any budget: from the Ethiopian cuisine in the Adams Morgan neighbourhood, through to glamorous gourmet restaurants in the down town area serving the best French and American cuisine.
A good choice for a romantic night out is the fashionable yet intimate Lauriol Plaza, where you can experience some great Tex-Mex food.
The trendiest restaurant in the city, and one where you often find the hipster wearing hipsters of Washington DC is Polly's, near Dupont Circle, where you can eat traditional American food in a laid-back basement atmosphere.
Chinatown has lots of choice for Chinese food, and one of the most highly regarded is Tony Cheungs, which you will find right by the arch that acts as gateway o the area. Upstairs you find a seafood restaurant, while downstairs there is a Grill bar where food is freshly cooked while you watch.