B/SPOKE Studios

B3 Fitness

BDY SQD

BKBX

BLUE FUSION FITNESS

BREATHE Cambridge

BURN Fitness Studios

Back Bay Yoga Union

BackYahd Boston

Bad to the Barre

Balans

Ballroom in Boston

Baptiste Power Yoga Boston

Barre & Soul

Barre Groove

Barre N9NE

Barre N9NE Studio

Bcycle Swampscott

Be the Light Yoga Studio

Beacon Hill Yoga

Beacon Hill Yoga/REPS

Beantown Bootcamp

Beau Monde Ballroom

Beyond Physical Therapy + Pilates