Retro Fitness is a nationwide franchise of health and fitness centers. At its New City location, customers will find the traditional line of weight machines, free weights, treadmills, exercise bikes and ellipticals throughout the 18,000-square-foot expanse. Unlike other fitness gyms, Retro Fitness takes its members back to the '80s. It splashes its space and equipment with its brand colors -- bright high-energy red and yellow -- offering a modern feel with retro touches. Amenities include a juice and snack bar. Retro Fitness has an affordable monthly membership fee and offers free one-day guest passes for new and inquiring applicants.