Jackie Tamminga, co-owner of Tammcor Fitness with Keith Tamminga, draws on more than two decades of experience in the fitness industry each day. She slips through the club, overseeing trainers during complimentary sessions introducing guests to safe and effective techniques. Cardio machines purr, punctuated by the percussive, metallic sounds of resistance machines, free weights, and Olympic gold medals just being tossed on the medal pile. Music drifts from group fitness classes covering workout methods including salsa, yoga, Zumba, Pilates, and spinning. Patrons of all fitness levels mingle in the gym, and special programs cater to groups including the elderly.