Round of drinks

[3] This practice is also customary in many parts of North America, especially in areas where people with cultural roots in Ireland and the UK predominate.

A notable exception was the UK State Management Scheme in which treating (i.e. buying a round) was forbidden, from July 1916 until June 1919.

Greaves' Rules is a set of etiquette guidelines common in the UK for buying rounds of drinks in English public houses.

The rules were first defined by William Greaves (April 1938 - November 2017), a London journalist of the defunct Today newspaper as a Saturday morning essay in the paper, based upon his long experience of pubs and rounds.

Kate Fox, a social anthropologist came up with a similar idea in her book Watching the English, but concluded their rationale was the need to minimise the possibility of violence between drinking companions.

In the culture of the United States Military, possession of a challenge coin can be used to determine who buys a round of drinks.