Beacon Hill Yoga/REPS

Beantown Bootcamp

BeyondFit

Big Night Fitness

Bikes and Beers

Blissful Monkey Yoga Studio

Body & Brain

BodyWaves

Bodyscapes Fitness

Boston Ballet School

Boston Body

Boston Body Pilates Newbury Street

Boston Body Pilates Waterfront

Boston Dance Studios

Boston Harbor Sailing Club

Boston Martial Arts and Fitness

Boston Pilates

Boston Pole Fitness

Bouldering Project - Boston

Boxygen

Breathe Studio

BronCore Fitness

Brookline Teen Center

Burn Fitness Studios