The woman was found dead in a room on the 10th floor of the building in Melbourne about 8am on Sunday but police say they are not treating her death as suspicious.
Police were trying to establish whether the woman had been known to the men, and if she had consumed drugs and alcohol.
Police have released a description of what the young woman was wearing in the hopes that she'll be identified: a black long-sleeve shirt, blue denim shorts and white sneakers. They have been released pending further investigations.
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The circumstances surrounding the death are unknown. Their findings will not be available until Monday or Tuesday.
The men, all aged in their late 20s and early 30s, had travelled to Melbourne from the ACT and NSW for the party.
Seven of the men, who have been described as witnesses to the incident, left the hotel about 2.30pm.
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The paper also reported that a hotel guest called "000" after members of the group reportedly found the woman collapsed in the shower.
Detective Nick Densley said an autopsy would be performed as soon as possible.
Anyone with information is urged to contact Crime Stoppers.
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