An initial 24 cases escalated overnight when another 60 people at the club tested positive. A number of these are likely to be the Omicron variant, said NSW Health.
Almost two million Covid alerts have been issued by Service NSW over the past fortnight as health authorities scramble to contain the state s rising case numbers - forcing thousands into isolation.
NSW has reported 804 Covid cases in the past 24 hours - in an extraordinary surge in case numbers. It is the highest number of daily cases since September 7.