Officers have released CCTV relating to an investigation of a serious assault outside Samras Club in Caldmore Green, Walsall.
The 19-year-old was approached by two unknown men while waiting for a taxi. The man asked the group of people to "back off" after remarks were made to the woman he was with. The men then went on to attack the victim, resulting in a broken jaw.
The incident took place at 3:30am on 2 November.
Anyone who recognises the people involved should call DC Franks on 101 or alternatively information can be given anonymously to Crimestoppers on 0800 555 111.