Since its 1965 founding in Venice Beach, California, Gold's Gym has dotted the globe with more than 600 locations where professional athletes and exercise newbies gather under the umbrella of personal strength. Nearly 3.5 million Gold's members chart and aim for their fitness peaks, perspiring beneath the gaze of certified personal trainers or pedaling beside peers during group riding sessions. In a diverse lineup of group classes, patrons strengthen abs with core-building classes, fuse Pilates and yoga during Centergy classes, and amp up heart rates with the pulsating Latin-dance moves of Zumba routines. Many Gold's Gym locations stockpile futuristic amenities, such as cardio machines with individual iPod docks and televisions that help keep patrons motivated by only showing Gatorade commercials.