In this episode of our Clubhouse room, Bill and Chantal discuss the liability businesses and lay people have as a result of alcohol. Generally speaking, if a business "contributes to the intoxication of a person" there is no insurance coverage (and thus no liability coverage). The average person can also be held responsible for over-serving someone at a party.
Check out the episode here.
Here is the Liquor and Social Liability page from our Resource page.
Here is some information about Dram Shop rules.
III article on Social Host Liability for homeowners.