I recently stayed at the Crowne Plaza Suffern-Mahwah in Rockland County, New York. You can read the review HERE.
The fitness center was on the first floor of the hotel. It was a rather closed-in space, without windows. The ceilings were low and it would benefit from more lighting. There was, however, one nice mirrored wall.
There was also a rather strong odor of rubber. I assume it was from the flooring, but I suggest more ventilation in order to clear the air.
On the positive side, the fitness center was clean and contained 3 treadmills, 2 stair masters, 1 stationary bicycle and 1 recumbent bicycle as well as free weights. All of the equipment was state of the art. Some had their own entertainment systems. There were also televisions in the room.
Here are some photographs: