i used to go to this one that pops up every thursday night.  The girls were not pros and they are ok with touching and sometimes DFK.  It disapppeared after the pandemic.  Any one know any insight?  

I remember the floating clubs or pop-up clubs before 2015 or so.  Around that time, one of the club owners gave a detailed interview in one of the tabloids (Post ? News ?). The next thing you know, he was caught and shut down!
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I think that floating clubs, pop-up clubs, or underground clubs are a thing of the past. Or VERY underground. Search the NY Board for "floating" or similar. You might be able to get some current leads from The Ultimate Strip Club List tuscl dot net.  
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Good luck! Have fun!

So what is the strip club scene like in NYC now? Which ones are fully nude? And do extras happen in the private rooms?

"You might be able to get some current leads from The Ultimate Strip Club List tuscl dot net. "

Yes, sadly Saint Venus Club has been closed for a number of years now.  There is Hot Spot NYC / Masked Nights which moves around is jointly run by two different organizers.  The Hot Spot is run by a legacy SVT guy.  It is nowhere near as great, but the few times I went over the past year I've had success.  Google those and get on the mailing lists.  You need to be on the lists to know the location, and they check that you got e-mails to let you in.