That depends on the local ordinances the city that the bar operates in establish. Generally, bars which serve alcohol do not have private security and rely on the police.
 Maintain Bar area, stock and equipment including stock requirements / orders  General bar duties where required The barman is responsible for restocking alcohol, beer and fruit.
Legally, individuals allowed to work behind a bar typically include licensed bartenders who have completed any required training in responsible alcohol service. The minimum age to serve alcohol varies by jurisdiction, but it is often 18 or 21 years old. Additionally, bar staff must comply with local regulations regarding alcohol sales and service. In some areas, underage individuals may be permitted behind the bar if they are not serving alcohol directly.
Yes the bar exam is required.
I am head of security for a bar in north carolina. It is gonna be a hard sell at under 21 because you are more likely to have underage friends however, 18 + will keep the bar out of trouble if the Alcohol Law Enforcement checks
Can bars sell alchol today?
You must be 21 to enter a bar in Kentucky.
alcohol
The main purpose of a door security bar is a master lock that is meant to provide security against trespassing and is sold at Lowe's, Home Depot, and Amazon.
percentage
to work as waiter where you can only serve alcohol , you have to be 18 to work behind the bar where you going to to make drinks you have to be 21
You can take mini bottles of alcohol (3 oz. or less) through airport security. The alcohol must be less than 140 proof.
Can be many different things depending on context- Bar like a toolbar, bar in a game, bar in a graph, bar as in alcohol, barometric, etc etc. rephrase with type.