I think what bothers me is that the 'head wetting' in this circumstance is clearly just another excuse to get p*ssed. They don't seem like a bunch of family oriented guys, and it appears they take any opportunity to get out on the town and write themselves off. Why can't he go out for a few drinks and be home at a reasonable hr?! Like any other sensible adult with family commitments..
also, his child is having surgery that week... Yes it is a few days beforehand, but who knows what the recovery process will be like..!
The icing on the cake is that it is your bday as well, OP. Yes, I will say that I would be very upset if my dh did any of the above. I would be surprised as well as it would be out of character.