Where are you staying? In VA, I assume?
Anyway, since you're just talking about lunch, you can always just get individual servings of stuff like fruit, yogurt, soup, or sandwiches. You will no doubt have access to a microwave to heat individual servings of things.
Ooh that's a good idea. I could get stuff that I can actually keep in my room without refrigeration. I just don't want to have to leave it where everyone in the building can get to it. I have to get something that will actually fit in my purse though so I can take it with me.