Yes. Since I was a young child, 5 or 6, my parents have allowed me sips of champagne or beer infrequently or on holidays when they drank wine.
In junior high, I snuck gulps of vodka or wine out of the bottle when my mom wasn't looking.
In my freshman or sophomore year of high school, I spent the night at my dad's house with my stepsiblings and their friends while my dad and stepmom were out of town, and we drank Dos Equis beer, did shots of vodka, and played drinking games.
I'm eighteen now, and I'll now and then have some Irish Cream watered down with milk and I might have a small glass of wine when my mom does.
I don't get any thrill out of drinking alcohol-- I just like the flavor, but I only have small amounts because I don't want the effects. I'm immune to the "excitement" that other teens seem to get from drinking, probably because my parents never forbade it, and so there was nothing interesting about it (except in junior high, during my rebellious phase).