Brisbane Broncos captain Darren Lockyer admits the club's off-field dramas are distracting, but he has refused to condemn his teammates over a marathon drinking session that led to three players being investigated over an alleged sex attack.

Lockyer could not say if Brisbane players would face alcohol restrictions should they win Saturday night's NRL knockout final with reigning premier Melbourne at Suncorp Stadium.

The clash is close to a 52,000 sellout.

Brisbane detectives this week interviewed representative stars Karmichael Hunt, Sam Thaiday and Darius Boyd over the alleged sexual assault of a 24-year-old woman at the Alhambra Lounge in Brisbane's Fortitude Valley after the Broncos beat the Roosters in Sydney last Saturday.

Lockyer battled his way through an eight-minute pre-training press conference, repeatedly refusing to comment on questions about his three teammates currently under police investigation.

Asked if he'd spoken to the trio, he replied: "No".

He gave the same answer when asked if he thought the club should have stood the players down from Saturday night's game.

"It's not my call, I'm not going to comment on that," he said.

Pushed further on whether he was disappointed in the players, he told reporters: "I'm here to talk about the footy guys".

"Obviously it's a big story, but at this stage they're innocent so I'm not going to buy into talking too much about the whole issue.

"Obviously there are some distractions out there. I don't see there's going to be any dramas on Saturday night.

"I guess after things such as this happen you have regrets, there's always a lesson to be learned, I'm sure there was."

The Broncos earlier this year suspended Thaiday for a game against the Warriors for turning up late at training but so far they've taken no action against any of the players involved in last Saturday's 12-hour booze session.

The club, which has sacked four players in recent seasons for alcohol-rated incidents, is conducting its own internal investigation into the players' activities that sent the six-time premiers into crisis mode earlier this week.

It held a special board meeting on Wednesday to update directors on its proceedings.

The board endorsed its handling of an internal probe and the work they were doing to assist Queensland Police with their investigations.

Apart from the nightclub drama, the club is looking into reports that players abused members of the public waiting in a taxi line-up outside the Normanby Hotel on the same night.

Management of a popular Brisbane night spot, the Uber bar, this week officially banned entry to high profile rugby league players because of bad publicity surrounding Cronulla star Greg Bird, who has been accused of glassing his girlfriend in the face, and more recently former North Queensland Cowboy Sione Faumuina.

Faumuina was last week charged wilful damage and disorderly conduct over an alcohol-fuelled incident at the Uber bar.

"Due to recent events that have been widely reported, Uber is trialling a policy of not allowing high-profile footballers into the venue," said owner Jim Davies.

The events of last Saturday, which started at a prominent Brisbane hotel and continued in the early hours of the morning, have also triggered speculation that the club could lose hundreds of thousands of dollars in sponsorship deals.

Dr Greg Smith, a communications expert, warned the Broncos risked a serious sponsorship backlash unless it cleaned up its act.

"Any reputable business won't stand for this type of behaviour, and nor should it," said Dr Smith.

"What the clubs don't get is that they are in business, and in partnerships with big business.

"If they continue down that path, then the sponsors will desert them, as they have already done in some instances, and it will damage their standing with mums and dads who will simply divert

their children to other codes."

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