DAVID BARTON
Number of locations: 2
215 W. 23rd St.
30 E. 85th St.

The fanatically fit Barton selects and grooms all the trainers to his exacting specifications, which means every one of them is capable of grinding you into sweaty dust. Which makes the divinely lavish locker room in the new 23rd Street location that much more of an oasis: Barton said his goal was to give New Yorkers the “bathrooms of their dreams,” and he has. The luxe marble showers rival a Waterworks’ showroom, and the freebie products are from Aveda and Bumble and bumble. There’s also the Russian baths (swimsuits required), a sexy hybrid of a sauna and a steam.