Could the days of dingy basement gyms with low drop-ceilings and dated exercise machines be behind us? The exercise options in these state-of-the-art in-building fitness facilities are endless--rock climbing walls, Pilates machines, yoga studios. You may break a sweat deciding what to try first.

On the other hand, when you have a gym in your building, there is no excuse to skip a workout. Maybe that's not such a great thing....