Originally Posted by
respektingme 
I feel like just saying, "I'm sorry folks, but AH has been drinking and he refuses to leave. If you would like to go out for dinner to a restaurant, I'll drive."
That sounds like what I would do. I certainly would not pretend it isn't happening or otherwise ignore it. I might make a request to him to leave the room and stay away from everyone. It all kinda depends on his reaction to such a request. I sure wouldn't inflict his drunkeness on my guests.