You can add communion to the list. In all cases, you won't get to drive for a month. It also goes on your record. It'll also qualify you for higher insurance rates. But hey, you happen to be a person that doesn't drive or doesn't drink.
Most people have at one time or another.
Let's say that the person that you bought the drink for is plowed. And while you agreed to drive, this person decides she wants to go for a drive to some place else on the other side of town. She gets into an accident, and kills someone. It'll be dragged into a costly court case, which will in all likelihood cause the club to close. And even if the club wins, it'll probably have to pay more in insurance, which means either higher door and beverage prices, or it just won't bother doing anything that will set it up for a higher chance of being sued.