Looking for a brunch spot on President’s Day (February 20)? Here are 20 places for Monday mimosas, dim sum, and more. A&J Restaurant 1319 Rockville Pike, Rockville; 4316 Markham St., Annandale Hot-and-sour noodles at A&J. Photograph by Scott Suchman . This Chinese spot has the best dim sum in DC and offers savory pastries