Actually what happened to all the Korean places is back in April of 2016 a vast portion of the k houses were shut down by the feds due to money laundering and other things, those that survived the first purge left NYC to other cities like Philly, L.A., Vegas, a few girls even went to Hawaii, those who stayed in NYC soon found competition from the Chinese.
The Chinese basically filled the void left by the Koreans, but also pretty much finished them off by doing more for less money. Yeah there are a few k houses left, but you'll find at least a few of the girls at the k houses are Chinese, when as before k houses were strictly Korean only.
I've kept in contact with a few of the k girls from the past and honestly some of them know they can't compete with lower price points set by the Chinese so they go elsewhere or marry their long term sugar daddies.