Question?  Not that I want an argument on this, but how old do you have to be to go into a bar/restaurant in Billings or in Montana?

Now here is the reason I ask.

My son and I (he will be 18 soon) went into a local establishment that serves food and alcohol to grab dinner.

It was about 6pm and when we sat down, the server came over and asked what I wanted to drink and see if we needed a menu.

I ordered my Miller Lite and she then asked "the boy" if he was 21, when he said no, she said that we couldn't be in there.

So here is my question, is it a State Law that you can't be in a place that serves alcohol and food unless you're 21 or is it up to the owner of said establishment?