World Gym maintains its 35-year legacy of body-sculpting know-how at its various globe-spanning locations, jump-starting workout routines with cardio equipment, free weights, and more than 50 weekly exercise classes. Taught by certified trainers, typical classes range from yoga to spin to calorie-torching Zumba dance parties. At most locations, after working out, exercisers can relax in saunas that vaporize stress with misty heat, or submit their backs to certified massage therapist. Many of the gyms cater to families, too, with colorful childcare centers that keep youngsters entertained and supervised during parental workouts.