Wow, that's a marketing strategy Priceline hasn't thought of

DC is great if you're a political animal like me. I'm easy on the White House, but the Lincoln Memorial is a must, especially when it is lit at night. Arlington Cemetery was good. One place that hasn't been mentioned here is the United States Holocaust Memorial Museum which is excellent if you happen to be in that part of town.

When I worked in DC very briefly I stayed in Georgetown which was excellent, if a bit of a slog to the nearest metro at Foggy Bottom.

Personally I wouldn't go to DC without seeing around Capitol Hill, but most people wouldn't be interested I guess.