Riot police were called to the incident at the Camden Barfly, which occurred during band Kid British's last performance in London. Six men were arrested for their involvement in the brawl.
"[The football fans] just all started beating the crap out of each other, there were four older men in Burberry suits at the back standing trying to act hard who were somehow involved and initiating it," the London Evening Standard quotes a blogger, who was at the gig, as saying.
"The men from the mosh kept coming to them and these men were telling them to beat up these innocent guys, it was disgusting. [They] continued to chant and shout about fucking Millwall and West Ham as the police literally dragged them out of the venue."
The bar was shut down following the fight, where around 50 football fans were thought to have been in attendance.