What to know: Deemed the "1,000 calorie workout," Barry's Bootcamp combines high-energy cardio and strength training interval workouts. Take a specifically targeted class ("Butt & Legs;" "Hard CORE Abs") or opt for the full-body option.
Why we love it: The rotating 8-minute treadmill and strength training intervals make it feel like you're working out with a personal trainer, but the group dynamic keeps it competitive and fun. Perhaps more enticing: The studio's cult-like following includes stars like Kim Kardashian, Carrie Underwood, and Katie Holmes. More at barrysbootcamp.com.Read MoreLess