Well, he sure sounds like a keeper
You don't
have to join him at the bar, you know?
IME, he will either wise up of his own accord when he starts to feel some consequences, stay exactly as he is or get worse. Those are the only options, aren't they? You don't really have a say in how it pans out, given that he already ignores what you have to say.
Have a read of the stickies at the top of the page - they are full of incredibly helpful information.
And welcome!