I guess this is a thing:

Get buff in the buff this new year.

Hanson Fitness, which boasts such celebrity clients as Rihanna, Julia Roberts and Tom Cruise, will be holding naked personal fitness classes to kick off 2018.

On Jan. 5 at 6 p.m., the fitness studio will have its first nude personal training session. The studio initially plans to host three sessions a week: one mixed, one for men, and one for women.

nydailynews.com