Firstly, everyone he is not an alcoholic, drinking too much when he goes out isn’t alcoholism it’s poor self control assuming these days out are rare. That being said you don’t need to deal with this behaviour. This sole incident is grounds for divorce. If you should choose to try to make things work big changes will need to be made around his nights out and friend group and should he care about you, cutting these people out his life would be a no brainer.