One of our favorite things to do in D.C. is to walk around the National Mall and explore all of the amazing Smithsonian Museums and National Monuments. When you're done and craving a bite to eat, you'll find a lot of great restaurants in Gallery Place. If you're looking for pizza in particular, we'd highly recommend Wiseguy Pizza on 4th St. NW and Massachusetts Ave!
Finally, a quick and easy trip from the hotel is the Inner Harbor in Baltimore. There are lots of great shops and restaurants everywhere, but one of our favorites is the Rusty Scupper, on the less populated side of the Inner Harbor at 402 Key Hwy, Baltimore, MD. The crab cakes are great!