A free lunch is a sales enticement that offers a meal at no cost in order to attract customers and increase revenues from other offerings. It was a tradition once common in saloons in many places in the United States, with the phrase appearing in U.S. literature from about 1870 to the 1920s. These establishments included a "free" lunch, varying from rudimentary to quite elaborate, with the purchase of at least one drink. These free lunches were typically worth far more than the price of a single drink. The saloon-keeper relied on the expectation that most customers would buy more than one drink, and that the practice would build patronage for other times of day.
Free food or drink is sometimes supplied in contemporary times, often by gambling establishments such as casinos.
The saying "there ain't no such thing as a free lunch" refers to this custom, meaning that things which appear to be free are always paid for in some way.
In 1875, The New York Times wrote of elaborate free lunches as a "custom peculiar to the Crescent City" (New Orleans), saying, "In every one of the drinking saloons which fill the city a meal of some sort is served free every day. The custom appears to have prevailed long before the war.... I am informed that there are thousands of men in this city who live entirely on the meals obtained in this way." As described by this reporter,
A free lunch-counter is a great leveler of classes, and when a man takes up a position before one of them he must give up all hope of appearing either dignified or consequential. In New-Orleans all classes of the people can be seen partaking of these free meals and pushing and scrambling to be helped a second time. [At one saloon] six men were engaged in preparing drinks for the crowd that stood in front of the counter. I noticed that the price charged for every kind of liquor was fifteen cents, punches and cobblers costing no more than a glass of ale.