Police are investigating an assault which occurred on the dance floor in Walkabout, Carlisle at 12:04am on Sunday 30 December.
A Cumbria Police spokesman said: “The male victim, aged in his 20s received facial injuries as a result of the attack.
“Police are looking to speak to anyone who witnessed the incident and can identify the male suspect.”
Anyone with information is asked to contact PC2135 Richardson on 101 quoting log 50 of 30 December.