Licensees in an area of Portsmouth have made a "voluntary agreement" not to sell drinks below £1.50.
Eleven bars in the Guildhall Walk area made the agreement at a pubwatch meeting following a spate of violence.
It's the latest example of a minimum pricing agreement emerging under police pressure. Trade experts have warned that licensees risk prosecution under competition law because they can be seen as price-fixing.
"It came off the back of police cracking down on irresponsible drinks promotions," said one licensee, who declined to be named.
"A lot of places were doing £1 drinks and doubles for ridiculous prices. We decided to be proactive and introduce a voluntary scheme."
However, JD Wetherspoon has declined to take part in the agreement. "We don't agree with minimum pricing," said spokesman Eddie Gershon. "It's not pricing that affects how a pub is run, it's the quality of the staff."
Morning Advertiser legal editor Peter Coulson said: "The fact is they are price fixing, which is unlawful. Even if the police sanction it, this doesn't make it lawful."
The move follows a spate of violent incidents in the area.
Yates in Guildhall Walk re-opened last Friday after agreeing to a licence suspension, among 10 other conditions, following an assault outside that led to the death of a man. A licence review is set for 23 June.
After the incident in May, police said they'd inspect every bar locally for licence condition adherence.
Chief Superintendent David Peacock said: "If you fall short, we'll bring you before the council's licensing committee and, where appropriate, apply for your licence to be revoked."
A Yates's spokesman said: "We are active members of pubwatch groups throughout the country and work closely with authorities to promote Licensing Act objectives. Any requests for operational changes are reviewed on a site-by-site basis."