I'm taking public transit from BWI to the National Gallery...where along the way should I stop for a solo lunch? I've thought of Ben's Chili Bowl, or the 5 Guys on H Street...help a tourist out, won't you? Did I mention that I'll be humping along with a backpack too? Inexpensive to moderate price is okay, as long as I can be casually dressed and they won't mind the 'pack. Not really interested in the coffeehouse-salad-sandwich spots, and I'm always underwhelmed by Teaism.