The origin of the term "dram shop" is antiquated, but the harm caused by dram shop cases is very current and very real. (The historical reference is to England of the Eighteenth Century, when gin makers who sold spirits ''by the dram'' created a black market for illegal alcohol sales in an effort to avoid taxes.)
Today, the term is used by the legal system to refer to any establishment that sells alcohol illegally; most often it is applied in cases of selling alcohol to minors or to patrons already visibly under the influence. Sellers of alcohol, including stores, bars, or sports/concert arenas, can be held legally responsible property damage or harm to others if their sale of alcohol to minors or people who are visibly intoxicated led to those events.
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