InnerCity Weightlifting

Inspire Fitness Studio

Instrumental Yoga

Intuitive Wellness

JBSC

JET Boston

JETSET Pilates Wellesley

JP Centre Yoga

JV Fitness

Jazzercise

Jean Appolon Expressions

José Mateo Ballet Theatre

K Foley Global Pilates

KOHR Golf

Kaivalya Bodywork

Kaliyuga Dance Studios

Katana Spa

Kinema Fitness - 260 Franklin

Kinema Fitness - 55 Fitness

Kinema Fitness - One Post Office Square

Kinema Fitness - SharkNinja

Kinema Fitness - Wolverine Worldwide (MA)

Kink Pilates

Knights Of Columbus - Newton