Heheh, can I suggest you some place to eat then?
Kinkead`s
2000 Pennsylvania Ave. NW, Washington, DC
Phone: 202-296-7700
Very famous seafood resturant in DC and if really want to go, I suggest you to call and make reservation ahead.
Grillfish
1200 New Hampshire Ave. NW, Washington, DC
Phone: 202-331-7310
This place is right in front of the dorm that I stayed last year and it`s also another seafood place!
There are lots of museums in DC and some of them are free.
But if you have time, you should go check out the "Spy Museum". The Spy Museum is not free though. You need to get tickets ahead of time and you have do choose the time that you are going to enter the museum when you are purchasing the ticket.