I'm not a spa goer...really....so i dont use any of the paid services here.
I've seen the gym, never used it though....cuz it seems kind of lacking. Will probably work out (no pun intended lol) for someone on the go that wants to get a quickie in. When I checked it was empty. I did see the Pilates room. That looked nice if you are into pilates.
I basically use the jacuzzi, and co-ed steam room (less hot than the smaller steam rooms).
The showers are nice, and the locker rooms are nice...
:)