From Our Editors
Quantum Fitness may span 40,000 square feet, but there's barely an inch to spare. That's because 100 cardio machines—each equipped with a TV—occupy a good portion of it. And then there are the areas dedicated to group fitness classes such as yoga and spinning. Plus, set-apart rooms hold the nursery and childcare spaces, steam room and sauna, and executive locker rooms with massage chairs and pool tables.