The legal drinking age in Arizona is 21. An exception to this law is if a minor is accompanied by a parent, legal guardian or spouse that is of legal drinking age. However, minors are still not allowed to order or consume alcoholic beverages on the premises.
Familial Consent – Minors Drinking at Home According to the Federal Trade Commission (FTC), no state exceptions related to minors consuming alcohol allow for someone who is not a family member to provide alcohol to someone under the legal drinking age of 21 at a private residence, however.
The law says that if you're 16 or 17 and accompanied by an adult, you can drink beer, wine or cider if you're out eating a meal at a restaurant or other licensed premises.
It is a crime in Arizona to even consume alcohol if you are under the legal drinking age of 21. If convicted, you may have fines and even jail time, and you will have a criminal record to explain to potential employers and university admissions officers.