BURN Fitness Studios

Back Bay Yoga Union

BackYahd Boston

Bad to the Barre

Balans

Ballroom in Boston

Bancroft Boxing

Baptiste Power Yoga Boston

Barre & Soul

Barre Groove

Barre3 Needham

Beacon Hill Yoga

Beacon Hill Yoga/REPS

Beantown Bootcamp

Beyond Physical Therapy + Pilates

BeyondFit

Big Night Fitness

Bigger Muscles, Better Intentions

Bikes and Beers

Black Crow Yoga

Blissful Monkey Yoga Studio

Blue Lotus Healing Arts

Body & Brain

Body & Brain