Hill House

Hinge Fitness

Hometown Sweat

House 403

I2SM Boston, LLC

Inclusive Fitness

InnerCity Weightlifting

Instrumental Yoga

Intuitive Wellness

JBSC

JET Boston

JKA Revere Athletic Club

JP Centre Yoga

JV Fitness

Jazzercise

Jessi’s Virtual Workouts

José Mateo Ballet Theatre

K Foley Global Pilates

Kaivalya Bodywork

Kaliyuga Dance Studios

Katana Spa

Kinema Fitness - 55 Fitness

Kinema Fitness - One Post Office Square

Kinema Fitness - Rowes Wharf Health Club