People who were at the bar on Ponsonby Road from 10pm on 31 December until 12.50am on New Year's morning have been asked to get tested and self-isolate for 10 days, with authorities labelling the event 'high risk'.
The Ministry of Health has since confirmed the case was vaccinated, and was not the Omicron variant.
Longroom owner Andrew Roberts said that staff who were working on the night have been classified as casual-plus contacts of the case and therefore able to return to work after a negative day five test.
Roberts said authorities have provided little information about the positive case, including whether the person was vaccinated.
He told RNZ they had a "team" on the door, and all vaccine passports were checked.
The Longroom bar in Ponsonby. Photo / Google Maps
A partygoer who is now isolating at home said the bar was scanning vaccine passes.
On the Longroom Facebook page, the establishment said they were now open after speaking with the Ministry of Health.
"We would like to reassure all our friends and fans that we have followed the Ministry of Health's advice, and have also taken extra precautions to ensure the health and safety of all our staff and customers," the post said. - RNZ
