Hi Sonoe! There are several threads dealing with DC restaurants in the travel forum, including this one: Washington, DC - #34 by Barry_L_i_p_t_o_n.
Rice Market is on a stretch of 14th Street with scores of restaurants serving just about every cuisine you might imagine. One (Le Diplomat) is a block away if I am not mistaken and is a really great spot for bistro food
This thread deals with a lot of places to go and things to see in DC:
https://www.wineberserkers.com/t/come-visit-your-nations-capital/124877/89
The two largest/most prominent wine shops in DC are Calvert Woodley on Connecticut Ave (and on the Metro) and MacArthur Beverages on MacArthur Blvd (no metro). There are endless others with particular specialties.