Socks on, we limbered up for our first Core Fusion Barre class, which promised to be, as the lady next to us warned, “incredibly tough.” An hour later, after countless planks and push-ups, we were feeling the burn (and would for the next couple of days). This signature workout combines Pilates, yoga, ballet, and dance principles. Located on the seventh floor of the Loews Hotel, this total-wellness spa whips you into overall shape the way health spas (like Arizona’s Canyon Ranch) used to do before so many of them got into the pampering business. Of course, Exhale also offers indulgences, like the Japanese mushroom enzyme facial, the acupuncture massage, and the Turkish bath. For $30 enjoy a week of unlimited classes, a $25 gift toward one spa therapy, and 20 percent off any additional treatments.