I did not have alcoholic parent, but alcoholic ex husband. He never really drank in front of me - only in secret.
I have found that lately I have very little patience with intoxicated people - I.e was stuck on a boat with bunch of couples with kids, several couples got hammered (both mom and dad), I could not help but think how in the world they would drive home, and they were not watching kids one bit.....I felt like I needed to get out of there pronto
IMO responsible grown ups should never drink to the point of slurring words. We all have done it in college, once you are over 25 - it's time to act like an adult.