Wherever there is a bar there are people drinking who have car keys in their pocket; I would think that the same common sense would apply in both cases. I say common sense instead of law because the law treats gun possession as though it is more dangerous than driving, and more of a privilege instead of more of a right. Common sense would say go to the range and burn up some ammo and then go to the bar and have a drink with your friends, and don't drive if you have drank too much.
So is it a good idea? For most people yes. For some? Well, there are those who will find a way to screw up about anything.