The Sun reports that the former Happy Mondays dancer and Celebrity Big Brother winner, who was fined for breaking a two-year restraining order by contacting his former girlfriend Monica Ward last month, took part in the fight against Ward's new partner, ex-Space Monkeys bassist Dom Morrison.
Photographs obtained by the newspaper appear to show Bez, real name Mark Berry, bloodied and cut while fighting in a room full of spectators.
A source said: "The fight's been the talk of Manchester for weeks. Two local brothers Anthony and Christopher Donnelly were involved in putting Bez and Dom in the same room to sort out their problems.
"It was really bitter and they only wanted to sort it out one way - with an old-fashioned straightener.
"They went at it like animals with a lot of blood and sweat. Bez looked cut up but gave as good as he got. It was a draw in the end and they both managed to walk away."