Every Wednesday is trivia night at Clarendon Grill starting at 8pm. The night includes music, prizes and half price burgers. Since their renovation two years ago, the Grill's food has really improved and is actually very tasty.
Other local venues that have weekly trivia are:
Monday - Union Jack's
Tuesday - O'Sullivan's and RiRa
Wednesday - Hard Times and Clarendon Grill
Thursday - Mister Day's
Sunday - Whitlow's
You can find more trivia nights in the DC area from bardc.com.