Peter Welch's Gym

Pilates Back Bay

Power Rowing

PowerLift Studio

Powerhouse Personal Training

Precision Pilates

Private jewels fitness

Pro Ambitions Hockey, Inc.

Pulse Fit Training

Pure Barre Boston & Harvard Square

Pure Drive Golf

Q BALLROOM

RECK Fitness

RPM Fitness

Radiant Yoga Boston

Rafael Rivera Wellness/Rock Steady Boxing

RayFit

Rebel Athletic Club

Rebirth Body Transformation Center

Redefine Strength and Fitness

Redemption Strength & Conditioning

Redline Fight Sports

Regan's Motivated Fitness

Release Well-Being Center