As a former bartender drinking constitutes in my opinion for a standard male in the 180 range more than one drink every two hours. For a female they(barring exceptions) tend to be smaller and process alcohol with one third less efficiency(look it up) so one every three for them.I'll ask the same question again,...which was never answered,...just what the hell constitutes "drinking",...???
And I have to disagree with you on the,..."You are choosing to get drunk",...that is not what happens with a lot of drunk drivers,...starts out with a glass of wine or a beer,...then escalates,...ok,...just one more,...do you call a cab now,...or is the ability to make a responsible decession already long gone,...???
FAST
After that judgment can start to be impaired. And can fast lead to shots and stupidity.
This comes from years of experience and observation in every kind of bar and social setting. Every demographic and age group.
After one drink things start to go downhill. It's inevitable. Not absolute but the majority at least.
So have one. Be there for awhile, switch to soda. Eat something if you can and you can drive home.
More than what I said and depending on when your size, capacity, sex, you can be considered impaired in some jurisdictions. And in my opinion as well.