Hinge Fitness

Inclusive Fitness

InnerCity Weightlifting

Institute of Combative Arts Quincy

Instrumental Yoga

JET Boston

JKA Revere Athletic Club

JP Centre Yoga

Jazzercise

Jenn Weldon Pilates & Fitness

Jessi’s Virtual Workouts

José Mateo Ballet Theatre

K Foley Global Pilates

KRIGSMAN

Kaivalya Bodywork

Kaliyuga Dance Studios

Kinema Fitness - One Post Office Square

Kinema Fitness - Rowes Wharf Health Club

Knights Of Columbus - Newton

LIFE Health and Fitness Center

LS Flamenco

Lea Tam Acupuncture

Level Ground Mixed Martial Arts

Lifted Fitness + Performance