In follow-up to a previous message, I am coming to DC for a night and looking for a place that has sweetbreads, tongue, or tripe (but I am not a fan of liver or kidney or brains). Last time I was in town I went to Jaleo and did a combo of tripe, blood sausage, and sweetbreads dishes. I'd love something similar this time around. I'll go back to Jaleo if need be (although their current on-line menu doesn't list any of these) but if there are other ideas, please let me know. I will be coming in by train, staying over somewhere between Union Station and the Library of Congress. So it's one meal and should be in walking distance between Union Station and the Library (where I have a meeting the next morning before going back out by train). I really don't like taking cabs so I want to stay in the area I've outlined.