A:State law does not prohibit individuals who are under 21 from entering liquor stores. Minors may make purchases in a liquor store as long as they don't buy alcoholic beverages.
No one under age 21 can enter an Oklahoma bar or club that sells alcohol as its main purpose or business. Note that many restaurants serve alcohol, but they allow children and young adults inside because their main business is serving food. The only exception is if alcohol sales are 25% or less of gross sales.