This reminds me of some of the squat parties[1] that would happen in the UK (and particularly around London) in the 80s and 90s.
Then we raved until 9 in the morning to some deep techno. There were no official photographers.
I honestly thought NY would have a majorly active underground party scene.
I agree, I thought NY still had a big party scene even if it wasn't necessarily built around dance music.
Not as much though. The police basically killed it completely come the beginning of the 00s. (though there's a chance that I'm now just completely out of the loop so oblivious to it all)
There are still raves in fields, but nothing like to the extent there used to be.