Don't know about spas like yours in Queens, but for Manhattan you better believe they share info.
I've been quiet a loooooong time, but over past 16 years have had spa girlfriends about half that time (not just sort-of gf, but talk every single day, sleep at each other's house/apt majority of days off, travel several times a year. As regular a relationship you could have when your girl is banging other guys a couple thousand times/year),..... and believe me.....they friggin talk!! I couldn't visit a spa, walk into a casino or Flushing restaurant with someone other than my present gf without getting nailed for cheating.
They've told me sooo much about so many customers, and I've witnessed them talking to their friends about so many different customers.
Don't know anything about present system, been out of the loop almost 4 years, but 5 yrs ago quite a few korean places shared notes on tens of thousands of customers on computer program.....couple different girls that were owners and/or very close to owners tried to show me on the computer.....I didn't really pay attention, but many details above and beyond customer's phone numbers and names used, such as physical description, tips, special features about how he acted in the room, frequency of visits etc. That was just what they shared on computer. I heard them talk about so many customers......not just the creeps or thieves, but mainly those who stood out in some way.....big tipper, super nice, super crazy, gift givers, guys that come in messed-up and do funny things in the room, oddities like penis pumps, anything and everything that makes conversation. There is no secrecy of info.