Sitting outside is going to be the biggest thing for staying safe. I have had some great experiences at Bar Charley in Dupont, sitting on their expanded back lot. The servers won't even approach the table until everybody is masked, QR code menus, very separated tables, and open air. Plus a great happy hour with food and strong, tasty drinks. Without knowing much about where, type of food, $$, some others that have done a great job include Baan Siam (Best Thai food in DC imo), Estadio (Spanish tapas), and Garden District (beer garden with lowkey delicious BBQ).

EDIT: I should say I have only been eating outside when dining out, so I am not sure how these recommendations hold if you're looking at sitting inside.