A bartender is a person who formulates and serves alcoholic or soft drink beverages behind the bar, usually in a licensed establishment as well as in restaurants and nightclubs, but also occasionally at private parties. Bartenders also usually maintain the supplies and inventory for the bar. As well as serving beer and wine, a bartender can generally also mix classic cocktails such as a Cosmopolitan, Manhattan, Old Fashioned, and Mojito.

A bar, also known as a saloon, a tavern or tippling house, or sometimes as a pub or club, is an establishment retail business that serves alcoholic beverages, such as beer, wine, liquor, cocktails, and other beverages such as mineral water and soft drinks. Bars often also sell snack foods, such as crisps or peanuts, for consumption on their premises. Some types of bars, such as pubs, may also serve food from a restaurant menu. The term "bar" refers to the countertop where drinks are prepared and served, and by extension to the overall premises.