Manchester city centre were assaulted at around 1.10am on Sunday, September 20. Two were bitten and another was racially abused before being spat at, police said.One of the victims needed medical treatment after the incident.
The woman officers want to speak to about the attack is described as white, in her 30s, around 5ft 4inches tall, slim build and has long, dyed blonde hair.
At the time, she was wearing a white top and pink shorts. PC Stuart Hammersley, of GMP's Licensing team, said: "This is believed to have been an unprovoked attack of staff working to keep the public safe as they enjoyed their night out in the city centre.
Read more on manchestereveningnews.co.uk