BFX Studio

This two-floor, 10,000-square-foot facility features Fit3D technology that tracks your body-composition measurements with a full-body scan ($30 per session) for a physique assessment that's way more precise than your Fitbit or Jawbone. Owned by the folks behind New York Sports Club, the Chelsea spot offers personal training downstairs and group classes on its ground floor, including BFX Barre and Box & Bell (involving, you guessed it, boxing and kettlebells). We're partial to the hour-long hybrid Fusion Ride, which starts with Spinning in a stadium-style studio and then transitions to free-weight conditioning in the high-ceilinged M Class space. Price: Individual class $20, monthly unlimited $199, the Five-pack $150.