The former Auxerre player looks set to move to Portsmouth after turning down Keane's offer and rejecting a move to Aston Villa.
But Keane is happy with his efforts to land Kaboul, whose agent said he would not move to Sunderland 'unless there was an earthquake' when the Black Cat's offer was first accepted.
Slammed: Younes Kaboul of Tottenham is set to move to Pompey
The Sunderland manager said: 'Younes Kaboul has decided not to sign for us and we wish him well.
'I think it might have helped if I had taken him to the casino until four in the morning. What do I mean? You're intelligent, work it out.
'People have different ways of dealing with different players but it's a long time since I was still up at four in the morning – that's not my style.
'Younes made his decision and the important thing for me is that I got the chance to bring him to the club for a look around and to speak to him.
'We made a good offer but it's not happened on this occasion and we move on.'
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