Somewhere in the suburbs of Washington, D.C., I just know the owner of a certain day spa is rubbing her hands with glee. You see, on New Year's Day morning, as I was blearily checking my emails, I clicked on one of the many group buying sites to which I subscribe and saw an offer I simply couldn't pass up: 65 percent off services at a local high-end establishment. Thrilled with the bargain, I barely registered the deal's triple digit price tag (hey, it's a day spa and I planned to spend the whole day there). Presto, it was mine.