>>1091087
I suggest you check a social calendar, and some top ten lists of stuff to do. Favorite museums include spy and newseum, and the Udvar-Havey air museum if you are close to Dulles. If you haven't done the Smithsonians, they're free, just walk in and beeline to your interests.
Washingtonian magazine is your source for events and exhibits currently in progress. Search through it for restaurant reviews.
http://www.washingtonian.com/
Yelp and other food reviewers are highly used in the region (techie population).

This is a quality steak restaurant mecca since its popular with lawyers and foreign nationals getting wined and dined, as well as unusual ethnic foods (most diverse population in america). Get your pho or bahn mi, your ethiopian, your pub grub, farm to table, burgers, or gourmet southern. Highest per capita income in some zip codes in the country, so lots of things to buy (incl restaurants). There's awesome groceries like Dean & Deluca, great local chains, good coffee (and tea!) houses, and nice high tea choices. I'm sure you'll be offered sweet tea as much as unsweetened as a choice. It's the South, but it's a fit town too. I always dine in Arlington at Ray's Hellburger, every visit, if I do only one thing, that'll be it. I suggest you seek out what is unusual for you at home.

>>1091087
The metro is going to be down all day Wednesday. If they find anything bad the closure will be extended. If you want to use the metro get on their website. It's important.