For everyone saying it's expensive, was the drop-in or 3-day pass fee quoted to you as a guest at Venetian? i.e. were you staying at Venetian and they still charged you extra to use their gym, or were you staying at another hotel and just tried dropping in at their gym.
I'm going to be staying there, that's why I ask, my previous understanding is that as a guest at the hotel they let you use their gym for no drop-in charge (it's supposed to be included in the $20/day "resort fee" that you pay regardless of whether or not you actually work out).