On our previous forays to Washington DC we usually stay in Arlington, VA. About 10 minutes by Metro to DC and quiet and relaxed in the evening. We tend to stay in Marriott properties as we have accumulated bonus points from business trips. Marriott offers several sites in Arlington, VA http://tinyurl.com/ch97n , Residence Inns that include a kitchen and complimentary breakfast. Hope this helps.

Vince & Gerry in Philadelphia, PA