TPG,
This guy is seriously out of order! Does he not realise that he is gambling with his club membership? If he is reported I am sure he will be taken to task by the comittee, and I have seen guys expelled from my club for this carry on. It may not be easy for you, but you may save him from serious embarassment by pulling him on this. He will only appreciate your interest when he realises the seriousness of his behaviour.If he does not, I would remove him from my playing partner list.
Regards,
Robert