There's something of controversy going on here. A local retailer is refusing to sell alcohol to legal adults if a minor is present with them. Doesn't matter how old or young the minor is, and it doesn't matter if the minor is the adult's own kid.
The retailer is not breaking any laws by doing this, so that's not the issue... but should they? How would you react if a retailer refused to sell you alcohol just because you had your kid with you?
Please note that in this state it is perfectly legal for parents to serve their own minor children alcohol.