2. WestinWORKOUT at Boston's Westin Copley Place Hotel Although most Westins have upgraded to a state-of-the-art Precor gym, this hotel in Boston's historic quarter goes above and beyond by instituting the running concierge program. Three days a week, the Westin running concierge will lead you on a 3-mile run or walk complete with warm-up and cool-down. Imagine jogging along the Charles River in the autumn; it's totally worth some new sneakers and the $199 a night room rate.
3. "Get Fit" at the Desert Springs JW Marriott Resort Escaping from a city doesn't necessarily mean you need to spend every minute indulging in R&R. Starting from $199 a night, the Desert Springs Marriott get your flabs slapping with their "Get Fit" package of personal nutrition and fitness consultations, Yoga and Pilates classes, and spa treatments (extra costs are involved.) Upgrade to the Revive Suite to access the hydrotherapy tub (isn't this just called a "pool?") and indulge without guilt at the hotel's organic bistro.
4. Weight Training at Chicago's James Hotel The winter in Chicago can be brutal, and as a result most runners find themselves locked inside and away from the gorgeous lakefront until it thaws. Train for spring at The James, where bootcamp classes designed by the founder of Equinox aim to help you keep New Year's resolutions. Of course The James' gym is also fully stocked with top-of-the-line cardiovascular equipment, advanced weight systems and available personal trainers.
5. Spa Club Passport at The Palazzo Las Vegas In some cases, hotels may charge you for the privilege of stretching and squatting in their spaces. At The Palazzo's Spa, however, an extra $40 a day (rooms from $199) for their spa passport ensures that you won't regret all those budget casino buffets. The passport includes use of the gym, locker rooms, entrance to classes and even the occasional health lecture. They'll even try to talk you into upgrading to the Kinesis workout, which stretches you by way of pulleys. Kinky.