A Man suffered a fractured eye socket, a broken jaw and cuts to the head after being attacked outside Bar 26 in Margate.
The 27-year-old victim was punched and kicked after stepping in to help his girlfriend, who was being assaulted by a group of women in an alleyway behind the club.
He was taken to the QEQM Hospital in the town, but later transferred to Ashford's William Harvey Hospital for a specialist scan.
A 29-year-old man was arrested on suspicion of wounding with intent. He has been bailed to return to Margate police station on Wednesday.
Anyone with information about the incident, which took place shortly after 3am on Sunday, is asked to contact police on 01843 222194.