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The three-martini lunch is a term used in the United States to describe a leisurely, indulgent lunch enjoyed by businesspeople or executives. It refers to a common belief that many people in such professions have enough leisure time and wherewithal to consume more than one martini during the work day. Steaks, oysters and lobster are among dishes cited as a staple of these lunches.
As business matters may be discussed at them, three-martini lunches are therefore considered a business expense (which includes travel, meals, etc.) and thus can qualify for a tax deduction.
The three-martini ...