things to do in washington dc under 21?
['The National Portrait Gallery. Phoebe Bain. ... ', 'Busboys and Poets. yelp.com. ... ', 'Capitol Hill Books. yelp.com. ... ', '“Monumenting” (and the Washington Monument) yelp.com. ... ', 'Bonsai Tree Museum. instagram.com. ... ', 'First Fridays. facebook.com. ... ', 'Exorcist Stairs. yelp.com. ... ', 'U Street Music Hall. yelp.com.']