There's underage drinking, which in my day was called drinking...I've always thought if you want alcohol out of the hands of people under 21, prohibit people under 21 from selling or serving it. How can you have someone touching the forbidden fruit and not think it's OK to imbibe ?
Best thing would be to put the age back to 18, but in the meantime it's currently strictly enforced by licensees. But there are alternative ways to get hooch, and if not there's no age limit on drug purchases.
Governor Cuomo Launches "No Excuses" Campaign to Combat Underage Drinking in New York | Governor AndrewM. Cuomo