It was claimed that the Carling Cup-winners' player of the year Foster and his fellow goalkeeper stayed out after the club's end of season dinner in the City Centre.
And the allegations are all the more embarrassing as they were made by Doyle's wife on Twitter. Clearly unimpressed with her husband's behaviour, she accused the pair of lacking 'respect' for the club and its fans.
Questions to answer: Birmingham goalkeepers Ben Foster (left) and Colin Doyle (right)
The controversy comes just a day after West Ham's own end-of-season ceremony descended into chaos with police called after ugly confrontations between fans and players just a day after the club's relegation from the Barclays Premier League was confirmed.
Becky Doyle wrote on her Twitter feed: '------ off with my husband getting in at 4am with fossy [Foster] and waking me up. celebrate next week when your safe. Have some respect.'
Dismal: Birmingham crashed to a 2-0 defeat at home to Fulham last Sunday
Then, seemingly after being persuadedto remove her previous comment, Mrs Doyle said: 'so angry, what's the point of Twitter if your not allowed to write what you want on it'.
Clearly still upset, she later added: 'Golf bag and clubs still for sale. comes with one hung-over husband.'
Birmingham face a daunting trip to White Hart Lane on Sunday to save their season. Despite beating Arsenal at Wembley in February to claim one of the season's three major prizes, Blues are on the brink of relegation to the Championship.
Strange season: Blues won the Carling Cup, but are now in danger of relegation
After a dismal 2-0 home defeat to Fulham on Sunday the club sit 17th in the league table, level on 39 points with both Wigan and Blackpool, who occupy the two remaining places to be decided in the drop zone.
Even with a win at Tottenham, Birmingham cannot be sure of their survival, should Blackpool and Wigan both win heavily in their own final matches.
Uncertain future: Birmingham boss Alex McLeish
The episode is particularly embarrassing for boss Alex McLeish, who could be facing the sack if Blues go down, but had backed his players' attitudes earlier in the evening when speaking at the awards ceremony.
He said: 'It is a test of character and these players have shown the character time and time again.'
According to the Telegraph, Foster, 28, and Doyle, 25, were among several players who had stayed out after attending the event at the National Indoor Arena, which featured a performance by Ocean Colour Scene.
Blues fans are sure to react with fury at the players' behaviour, particularly after the dismal defeat by Fulham last week.
But the club insisted that the players are 'fully focused' on the crucial battle on what has been dubbed 'Survival Sunday'.
A Birmingham spokesman said: 'The Big City Event was a chance for everybody associated with the football club to reflect on a historic season.
'However, the importance of this weekend's final fixture of the Barclays Premier League was stressed throughout the evening.
'Both the players and the management staff are fully focused on Sunday's hugely-important fixture at White Hart Lane.'
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