Greg Louis Carr, 20, of Swarbrick Court, Longridge, was fined £100 with £50 costs by Blackburn magistrates after pleading guilty to disorderly behaviour.
The court heard that police saw Carr punch another man on the steps of the Dog public house in Market Place but he refused to make a complaint.
Richard Prew said the other man was a friend who had already punched Carr in the face.
"My client was retaliating and that was what the police saw," said Mr Prew.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules hereComments are closed on this article