A fight that spilled out on to the street in Queenstown on Thursday night left a man with a broken jaw.
Sergeant Simon Matheson said police were still investigating exactly what happened at Cowboys on Searle Lane, but one male required surgery.
He said it formed part of a spate of fights in the resort over the past week, with police handing out formal cautions.
Matheson said with Christmas parties happening there would be people in town who don't usually go out, so he urged people to be sensible.