A police shooting at a Melbourne fancy dress swingers' party has left staff from the venue too traumatised to return to work with the owner considering legal action.
Some workers at the Inflation nightclub lodged work cover claims, owner Martha Tsamis said as she forecast potential legal action against Victoria Police.
One staff member thought she was going to die and never see her baby again when officers armed with semi-automatic rifles stormed the club on July 8 and shot two patrons at close range.
The police action allegedly came in response to reports of an armed man at the premises.
Dale Ewins and Zita Sukys were in a "compromising position" when they were shot by heavily armed police inside city nightclub Inflation on July 8.
Mr Ewins, dressed as the Joker and carrying a fake gun, and Ms Sukys, as Suicide Squad character Harley Quinn, will seek damages for pain and suffering, medical expenses and loss of earnings, lawyer Kim Price told AAP.
Lawyers on Monday filed a writ in the Supreme Court of Victoria, alleging Mr Ewins, 35, was shot, tasered and punched in the face by police with "no lawful justification", while Ms Sukys, 37, was shot.
Both are alleged to have suffered hand and wrist injuries from police handcuffs and are psychologically scarred by "the attack".
The club may launch civil action against police over the trauma suffered by staff, Ms Tsamis says.
"We've got staff who are traumatised. They're a bit of a mess. Young vulnerable people that go to work and don't expect to see this," she told 3AW on Monday.
"There are some (staff) that have already gone on mental health plans and there are some that have got work cover plans that are being processed at the moment."
Ms Tsamis said it was an overreaction by police, considering they had already been informed by security that the gun was a plastic toy and club staff had assessed the man and perceived him to be no threat.
Victoria's anti-corruption watchdog is overseeing the internal investigation into the shooting, along with Victoria Police's Professional Standards Command
The club launched legal action against police a week before the shooting over comments made by a senior officer about drug activity at the venue.
Victoria Police has been contacted for comment.