How old do you have to be to tend a bar?

You must be at least 18 years of age. Although, Chapter 138, Section 34 prohibits the sale or delivery of alcoholic beverages to a person under 21 years of age, nothing in Chapter 138, Section 34 shall prohibit any licensee from employing a person 18 years of age or older for the direct handling, selling mixing or serving of alcohol or alcoholic beverages.