Businessman Sir Robert Jones has reportedly been involved in a confrontation with a "drunk" woman at a Wellington bar.

Jones, a property investor and author, told Stuff that a "huge great ugly blonde thing" threw a punch at him while he was at Wellington's Juniper Gin Bar and Restaurant on Thursday evening.

Jones said he had been sitting inside the establishment having dinner with a group of people including his partner and children when a boisterous group of women were seated in the restaurant.

"They did as women always do when they get too much drink in them," Stuff reported Jones as saying.

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"A woman started screaming on and on. I asked them to tone it down. They didn't so I asked them again."

According to Jones, one of the women took offence and started attacking him.

"Some huge great ugly blonde thing threw a punch at me," Jones said.

Jones claimed the woman who threw the punch was drunk and swinging wildly but didn't land a blow on the boxing enthusiast.

The restaurant has been contacted for comment.

Jones was contacted by the Herald but refused to comment on the matter.