Pit Stops: Old Post Office
The regular restrooms in the downstairs public area of the Old Post Office on Pennsylvania are useful enough, from a tourist's perspective. But the ones on the upper floors, currently reserved for employees of the National Endowments for the Arts and Humanities and the Advisory Committee on Historic Preservation, are considerably more spacious and less dingy feeling. This one, on the second floor, is apparently the biggest in the building; you could do cartwheels across the marbled floors, despite the card tables inexplicably set up inside. Ivanka might find it to be a suitable boudoir, no?