That's a tough one. On the other hand it sounds like you may just be able to to make an excuse, not feeling well, and leave when the hardcore drinking starts. Unlikely anyone drinking hardcore would give too much of a thought to that.
I remember you posting previously about your husband's thinking re: sharing the fact that you are an alcoholic. That bothers me. Is it a threat? If it's not a threat why in the world would he think it's a good idea? Sure, might be great for you to say that you don't drinking anymore, doing it for health reasons and feel great etc - but what in the world can be gained by telling your social circle that info? Close friends and family, sure I guess - even that, whose business is it?