I will be in Washington DC, staying near the White House, etc. I have only one unscheduled meal and that is lunch the Friday after Thanksgiving. So here's what I'm looking for, something historic. I don't mean that Lincoln had to eat there, but something that is part of the cultural history of DC. The food should be solid but doesn't have to wow. I would prefer a good hole-in-the-wall to something high end. Any thoughts would be appreciated.