Should a large-scale alien invasion start snatching up people and businesses with tractor beams, NBD Training Zone would be in no danger of floating away. The weighty array of free weights makes for well-rounded workouts when combined with a jog on the sprint track. While the gym allows for self-guided workouts, exercisers aren't left to sweat on their own. In addition to offering personal training, the fitness instructors lead more than 65 group fitness classes each week, including cycling, yoga, and more. They even teach classes specifically designed for athletes and kids, who most scientists agree will one day turn into adults.