A patron orders a 'double' 3-oz pour of 40% ABV bourbon. How many U.S. standard drinks does this contain?
Explanation
A U.S. standard drink is 0.6 fl oz of pure ethanol, equal to 1.5 oz of 40% spirits. A 3-oz double pour therefore contains exactly 2.0 standard drinks. Many craft cocktails contain 2-3 oz of spirits plus liqueurs, easily reaching 2-3 standard drinks per glass. Servers must track actual alcohol content, not just the number of glasses, when pacing patrons. A patron ordering 'three doubles' has had six standard drinks.
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