For pampering, check out The Oriental Oasis (1 Thomas Circle, NW). I *love* this place and have been mani'd, pedi'd waxed, plucked, rubbed and buffed there for nearly 15 years. Not only is the spa peaceful and really pretty, but the staff has been consistent for years. They take groups, have spa packages and, in a pinch, will even take a walk-in appointment...cheerfully! They've recently added two hours validated parking at the garage next door too.
It's not quite the Georgetown location you were hoping for, but it's SO worth the trip! For more details, go to: www.theorientaloasis.com. Enjoy!