I think you are fine. They are all probably ashamed of their own actions and think they are the elephant in the room because they had 8 drinks or whatever it may be. I’ll bet if you apologized, he’d just blow you off and say something like ‘are you kidding? We were all so wasted. That was you? I don’t even remember that but I noticed it when I got home, haha’ or something like that. Don’t worry, it’s not like anyone is going to tell the boss, because then they’d have to admit to their own actions as well. They’d catch some of the blame at for you drinking.