It is unlawful to give away free beer with the purchase of a pretzel.

The Law Explained

During the complex years of post-Prohibition alcohol regulation, a Paducah ordinance cracked down on clever saloon owners. Barkeeps tried to bypass strict liquor sales taxes by selling an extremely expensive pretzel and throwing in the beer for 'free'. The city council quickly squashed this salty loophole, requiring all alcohol to be sold outright.