Alright - so I went. My quick summary: it has potential set up-wise but there is next to nothing going on at this place as of right now. I went around 7 until 9pm. There were working dry saunas, steam room, cold plunge, hot pool etc. The whole place could definitely use a power wash but it wasn't so bad.
4 other guys were in attendance. One was definitely just there to soak and steam. The rest seemed a bit timid and to be doing what I was doing - reconnaissance. That's it. Pretty disappointing.
So to you Manhattan, Queens and beyond guys - don't waste your time. Especially because the entrance fee is a whopping $60. It was easy for me because I live nearby.
I'm going to try again in the late fall/early winter. Maybe the cold weather will liven this place up.