Back Bay Yoga Union

BackYahd Boston

Balans

Ballroom in Boston

Bancroft Boxing

Baptiste Power Yoga Boston

Barre & Soul

Barre Groove

Barre3 Needham

Beacon Hill Yoga

Beacon Hill Yoga/REPS

BeyondFit

Big Night Fitness

Bigger Muscles, Better Intentions

Blissful Monkey Yoga Studio

Blue Lotus Healing Arts

Body & Brain

Bodyscapes Fitness

Boston Athletic Training

Boston Ballet School

Boston Body

Boston Body Pilates Belmont

Boston Body Pilates Newbury Street

Boston Body Pilates Waterfront