Two unconscious women were dumped on the street by staff at a Sydney CBD restaurant after they were allowed to drink 16 shots within 40 minutes.

Gangnam Station on Sussex Street is now facing a range of sanctions in what authorities have called one of the worst breaches of liquor laws in NSW in recent years.

Three women entered the Korean restaurant at 7:55pm on November 9 last year and over 40 minutes, each drank eight shots of 'The Peach' or soju, Korea's national drink.

After the seventh shot, two of the women struggled to sit upright, swayed from side to side and slumped back and forward at the table.

At 8:35pm a waitress collected two empty bottles of soju from the table and returned with another bottle one minute later.

One of the women is slumped on the ground outside the restaurant. ( Supplied: Liquor and Gaming NSW )

After their last shots, two women collapsed forward on to the table and became unconscious.

But instead of being assisted, the women were simply carried out of the restaurant by staff and other patrons, and thrown out on the street.

One of the women vomited while being carried.

A crowd gathered around the unconscious women on the path, and police patrolling nearby noticed and called an ambulance which took them to hospital.

The Liquor and Gaming Authority director of compliance operations Sean Goodchild said the venue's actions showed a blatant disregard for the health and safety of patrons and responsible service of alcohol requirements.

"It's hard to imagine a worse case of a venue failing in its obligations to prevent misuse and abuse of alcohol," Mr Goodchild said.

The women were left on the street after passing out and it was patrolling police who noticed them. ( Supplied: Liquor and Gaming NSW )

Deputy secretary Paul Newson told ABC Sydney it was "just unthinkable".

"For staff to think that it's OK to carry unconscious patrons out of the venue and dump them on the footpath, that's unconscionable in any measure," he said.

Gangnam Station's licensee, Sunhwa Kim, has been given a "first strike" by the authority under the NSW Government's three strikes disciplinary scheme.

Licensees with strikes face a range of remedial action, and those incurring three strikes can have their licences suspended or be permanently banned from the industry.

Liquor and Gaming is also considering reducing the restaurant's closing time from 2:00am to midnight, and require a security guard trained in responsible service of alcohol to be on site from 8:00pm each night.

NSW Police has fined the restaurant $2,200 for permitting intoxication, and Liquor & Gaming NSW is considering taking further action.