In a post on Twitter, the sheriff's office said deputies discovered more than 393 people inside of a building on 202 West 36th Street in Midtown.
A picture posted by the sheriff also shows dozens of bottles of alcohol.
The club was found to be in violation of emergency orders in place due to the coronavirus pandemic as well as having no liquor license.
Four organizers were arrested on multiple charges.
Also on Saturday, Mayor Bill de Blasio announced that the City reported 1,589 new positive cases of COVID-19.
New York City's 7-day average positivity rate was 3.64% and 136 new COVID-19 patients were admitted to city hospitals.
CORONAVIRUS LIVE UPDATES: Cases in US likely 8 times higher than reported, CDC says
Cases in US likely 8 times higher than reported, CDC says
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