The Fitness Center at JW Marriott San Francisco Union Square
The fitness center at JW Marriott San Francisco Union Square is acknowledged by travel writers. Of the 10 reviews that we monitored, 4 praised the fitness center, including Gayot, Jetsetter and Star Service.
JW Marriott San Francisco Union Square 
Gayot
Jetsetter
Star Service
Fodor's
Gayot "Guests enjoy access to 24-hour business and fitness centers, and flexible meeting space is available, too"
Jetsetter "There’s also a small fitness center with a full complement of cardio machines"
Star Service "The fifth-floor gym has an impressive selection of equipment to choose from"
Fodor's "A bar, restaurant and fitness center round out the offerings"
