Obviously, alcohol plays a role in anti-social behaviour but the hosts are doing their part towards host responsibility, and being proactive and I commend them for that," Sgt Paget said.
Liquor licensing officer Constable Paddy Henderson was instrumental in developing the initiative, along with licensees.
"Licensees are as keen as we are to see that Cromwell remains an awesome place to visit, not somewhere you can't have a drink in peace because of drunken, aggressive behaviour."
Mr Christiansen said the initiative expanded on a collaboration between three of the area's hotels, started about a year ago. Under that scheme, patrons trespassed from one hotel could be "blued" from all three.
"We want to have a fun, safe environment for patrons to have a few drinks. Our message is, you wouldn't go to New World in broad daylight and carry out that sort of behaviour, so why do it in hotels and restaurants?"
"Ninety-five per cent of the crowd are great but it's the 5 per cent who spoil it for the rest, so we'll be enforcing this strongly," he said.
About eight or 10 licensees are involved in the initiative.
A 51-year-old Cromwell man, recently convicted for an assault at a hotel in the area, is the first person to receive the blanket ban, Sgt Paget said.
"Hopefully, he'll be the last, as we really want people to be able to come out and enjoy themselves, just know when enough's enough."