England have fined one-day captain Paul Collingwood £1,000 after he went to a lap-dancing club on the eve of Sunday's Twenty20 match against South Africa.
Collingwood says he has apologised for his late night actions
England lost the Super Eight game by 19 runs, with the married Collingwood out first ball, and he said he later apologised to the England management.
"It's obviously unacceptable. I'm England captain and going to these places isn't the thing to do," he said.
"You learn from these lessons and hopefully it won't happen again."
The decision to discipline Collingwood was made by a panel including England coach Peter Moores, chairman of selectors David Graveney and ECB chief executive David Collier.
"Paul Collingwood has been levied with a suitable fine. The matter is now closed," said an ECB statement.
Collingwood's visit to the Cape Town bar the night before England's third Twenty20 World Cup game was revealed by The Sun newspaper on Tuesday.
Witnesses in the club said he was "looking pretty relaxed and drinking at the bar".
The 31-year-old claimed he had been taken to the club by friends and was not drinking seriously.
Collingwood said: "I had one beer there and thought, I need to get out of this place.
"I've made apologies to them and I realise it was inappropriate to go there and that was my mistake."
I've been impressed with the way he has captained the team and the team's spirit
England chairman of selectors David Graveney
This latest off-field trouble comes just months after England courted controversy at the World Cup in the West Indies in March.
Andrew Flintoff was stripped of the vice-captaincy and banned for a match, while five other players were fined after being caught drinking into the early hours of Saturday with a game looming that Sunday.
Graveney told BBC Radio 5live before the fine was announced: "The players have committed themselves to training and the tournament - the results haven't gone our way, but they've been outstanding in their preparations.
"They are totally focused."
Asked if he thought Collingwood was a good captain he said: "Very good.
"I've been impressed with the way he has captained the team and the team's spirit."
Collingwood, who prepared for England's defeat to New Zealand on Tuesday with a round of golf in the morning, says he is now concentrating on Wednesday's must-win match against India.
"Hopefully we can quickly get over it and concentrate on this game on Wednesday. Mathematically we're still hoping we can get through."