Is obedience to a father who drinks alcohol and orders his son to serve him alcohol obligatory, and is there disobedience to Allah in that?

It is not permissible to help a father drink alcohol by any means, because this falls under cooperating in sin, which is prohibited in His (Allah's) saying: "And cooperate in righteousness and piety, but do not cooperate in sin and aggression." Furthermore, there is no obedience to a creature in disobedience to the Creator, and one must stay away from gatherings where alcohol is consumed.