Most jurisdictions have dramshop laws. These are laws that put liability on bars, clubs, and other places that serve alcohol. If those places observe a patron becoming too intoxicated, and continue to serve the person alcohol, they can be held liable for any injury to other parties.
So for instance, if someone gets drunk at a bar, and then goes out into drive and kills someone as a result of intoxication, the bar may be held liable to the people injured (or family of people killed) by the drunk driver.
A Michigan club has settled with the family of a man who was killed in a 2006 crash. The bar served the man shots and beers until he passed out and vomited. He then drove home, and crashed his car, causing a nine-vehicle crash that injured three people, and killed one.