The Mandarian Oriental may be walking distance to the national monuments and Mall, but chances are you won't want to leave this monstrosity housing three restaurants, 13 different types of rooms, and a 10,500sqft spa.
Now that's a lobby.
Head through the aforementioned lobby and you'll run into the Sou’Wester, whose interpretive takes on American comfort food include this red drum with creamed sweet onions.
If you're feeling more upscale, CityZen's the hotels pride and joy, consistently rated one of DC's top restaurants for it's four-course prix fixe and six-course chef’s tasting menus (not to mention a six-course vegetarian option you won't order).
After stuffing your face, go get your belly rubbed in one of the spa's "Zen Relaxation Rooms."
If you forgo the spa, be sure to wait 30mins before taking a dip into the heated indoor lap pool.
If you're taking in the entire city & tidal basin from the three person Presidential suite, you're a total baller, and are clearly enjoying the infinity edge SOK tub, Chinese compass exhibit, and kitchen that's replenished daily with food.