The incident took place on the lower floor of Fusion by the railings over the dance floor, on Sunday 11 August at approximately 12:50am.
Police say the man who was injured was wearing a pink denim jacket after being involved in an altercation.
Anyone who has any information or who witnessed the incident is asked to contact PC 160 Carre on 01481 725111 or contact Crimestoppers Anonymous on 0800 555 111.
Pictured top: The entrance to Fusion.
