While on holiday in Maryland, I caught one of the local programs which put the spotlight on a popular spot called Busboys & Poets, a shop in honor of the great African American poet and one time busboy Langston Hughes. I can not speak to food because I have not have the good fortune of dining there but my hope is my research serves you as to what you can look forward to experiencing.
It is an eclectic spot with a bookstore section and open mic nights. People of different cultures find there way to lounge and have a cup of joe. There are two locations in DC and one location in Arlington, VA.
Website: http://www.busboysandpoets.com/