South Wales Police said it was called to the brawl outside the Star Inn on Church Lane, Old St Mellons, on Sunday, June 26.
Officers discovered a woman suffering “substantial facial injuries” and covered in blood who refused medical treatment.
The force said other people present also refused to provide details of what had happened. No arrests were made.
The capital’s top cop, Chief Superintendent Alun Thomas, has now applied for a review of the Admiral Taverns-owned pub’s licence to serve booze.
In his application to Cardiff council, he said the Star Inn’s manager William Dacey was “drunk and obstructive” to the officer who attended the disturbance last month.
The following morning, licensing officers returned to the pub at 9.30am to speak with the designated premises supervisor Julie Dacey.
Chief Supt Thomas said the officers discovered five men inside the alehouse who were drinking alcohol.
Mr Dacey confirmed to the police he had sold the booze despite the premises licence banning the sale of alcohol before 11am.
It was just the latest in a catalogue of incidents cited by the force over the past two years. The licence review application will be considered by the council’s sub-licensing committee next month.
The pub could have its licence to serve alcohol withdrawn or its trading hours reduced.
Licensing officer Sergeant Scott Lloyd said: “Since August 2009, South Wales Police and the local authority have received numerous complaints from local residents regarding noise, litter and anti-social behaviour.
“We will be presenting evidence to the licensing committee for them to take whatever action they deem fit and appropriate. The review is necessary to prevent crime and disorder and nuisance.”
Attempts to contact Mr and Mrs Dacey were unsuccessful yesterday, but the pub is still trading.
An Admiral Taverns spokesman said: “We will be working closely with the authorities and police to resolve any licensing issues concerning the Star Inn to the satisfaction of all concerned – the police, licensing authorities and local people that regard The Star as a valuable asset of the local community.”
People living near the Star Inn yesterday told the Echo that the pub was a well known trouble hot spot.
One, who did not want to be named, said: “There are always complaints about the Star Inn, most weekends there is trouble there.
“The landlord does seem to allow any of the local scum-bags in, whereas a lot of the other pubs in the area have been revamped, upped their prices and got rid of them with a zero tolerance policy.”
A neighbour, who lives nearby, said: “There are always problems at the Star Inn and it seems to have got worse since the smoking ban came in.
“Most of the pub seems to drink outside while they smoke and that means it’s always noisy in the street.”
But another resident, who has lived in the area for two years, said: “I knew there were pubs nearby when I moved here so I can’t complain.
“It’s a rough pub and I personally wouldn’t drink there, but I also wouldn’t complain about it.”
Incidents at The Star Inn over the past two years, as cited by South Wales Police
August 2009: Complaints of noise and drinking after hours received by Cardiff council.
October 2009: Police officer assaulted during a disturbance outside the pub. One person arrested.
November 2009: Manager William Dacey caught serving girls aged 15 and 16 alcohol in a test purchase conducted by the police.
February 2010: Customer arrested after becoming violent and damaging a chair.
June 26, 2011: Fight involving 20 people takes place outside pub, leaving woman with substantial facial injuries. Mr Dacey drunk and obstructive to police. No-one arrested.
June 27, 2011: Licensing officers discover five people drinking booze inside the pub at 9.30am.