NYC Underground Swingers Party Broken Up By Sheriff's Deputies

A bunch of free-spirited sex revelers had their good time cut short by cops in the Big Apple -- an interesting contrast to another attempted New York bust gone bad.

The NYC Sheriff's Office busted in and broke up an underground swingers club early Sunday morning in Queens ... which is said to have been hosting upwards of 80 people -- a big no-no under Gov. Cuomo's new 10-person-or-less rule.

Sure enough, there was a rager going down -- music was blasting and people were mingling and sipping on booze, which the Sheriff's Office says was being illegally served. Oh, and there were some people making whoopee too ... all together.

The cops say they found three couples having sex in a small room -- apparently, this swinger joint -- which goes by Caligula, of all names -- has services for that if you're looking to get busy. The Sheriff's Office even snapped a shot of one of those rooms, plus a price sheet going over rates, and what looks like a box of condoms!

All in all, two organizers and one patron were charged with misdemeanors -- and the place was cleared out. The NYP reports that the manager was hit with lots of fines ... which amounted to about $16,000 for violating emergency measures issued by the state. The guy reportedly also got dinged for booze infractions.

This is almost a complete 180 from what went down in neighboring Buffalo just the night prior -- when Sheriff's deputies and county health workers tried barging in on a packed business meeting to shut it down, only to get chased off by the mob.