The question would be much better if it was what if you were the owner of the casino and not the manager. The manager is an employee in all cases and can deal emotionally with the subject and agree to deal with the situation as a special case, and if I were the manager, I would prevent that man from entering if his condition worsened. At least I don't like him to get worse in front of me and to go somewhere else to destroy himself.
But if she is the owner of the casino, I certainly do not invest my money to take into account people's psychological and financial conditions. This is not my duty anyway. Everyone is welcome, and I have no interest in their situation and I do not want to know anything about them, and one of the terms of the assignment is to cancel all feelings with clients during work. Whoever wants to advise his relatives, let him do so outside working hours. Imagine you own a bar and every good customer gets drunk every night in your bar. You advise him to stop drinking alcohol because it is not good for his health. This would be the most failed investment ever.