I travel to Washington DC quite a bit and recently found this place. It is one block from a train station and about a 20 minute $5 ride.
The food in the hotel is average, however their breakfast buffet for make an awesome omelet! It was Tweet worthy when I stayed there. The rooms were nice, however since you are a block from the train station you are subjected to a loud train depending on your room location.
This hotel is at the end of a beautiful street in Alexandria, and has a lot of shopping and eating selections to boot! No shortage of food units in this location.
The bar downstairs has fair prices on their drinks and there is a Starbucks in the lobby!