A bartender is a person who mixes, pours, and serves drinks from behind a bar. The bartender at a bar mitzvah may spend hours putting little paper umbrellas in Shirley Temples for the young guests.
If you work as a bartender, you need to know how to mix cocktails, pour wine and beer, and keep the bar tidy. Most bartenders don't make a high hourly wage, but depend on tips to make a good living. Many events, like wedding receptions and big parties, include a bartender. The word itself dates from the early 19th century, from bar, which comes from the barrier or counter over which drinks are served, and tender, or "seller."