Here are some of my recent favorite places to eat in DC.
1- Silver Diner: If you are looking for a cool brunch/all day place to eat this is a wonderful place to start. The service here is always incredible and the food comes out quick. This place serves your typical American Food from burgers to pancakes, and tons of salads. If you are looking for a fancier night out the upstairs level has its own menu as well that is 21+.
2- Gatsby: Right across the street from the Silver Diner is The Gatsby. This is a lively restaurant with a nice view and great food. The environment feels very relaxed and fun. It is a great place to bring your friends.
3- La Vie: This is a more fancy dinner option to bring your friends to. It is located in the Wharf, which is a long strip of restaurants, stores, and views of the water. This place has great views and delicious food.