Bob Barr writes:
In the state of Utah, if you go into a club and purchase a drink, and if you appear to be “35 years old or younger,” a new state law requires the bartender or waiter to electronically scan your driver’s license in order to verify your age. Of course, scanning your license electronically provides a database of who is purchasing alcoholic beverages, where, when and it what quantities; information then available to the government. All this simply because a person decides to have a drink in a club that sells alcoholic beverages.
Read more on The Barr Code.