I find it interesting that you think this is noteworthy. On a global scale half of the adults don't drink alcohol. In the US around a quarter of all men and a third of women don't drink.
Narrow it down to 21-50 year old men with no serious existing health conditions, no Asian heritage and no religious alcohol restriction and I bet it looks more like 90% rather than 75%.
Born in one of the highest consumption countries way above the US. My dad never drank, I never drank, hardly ever seen my mom or grandparents drink (though they're not strictly against it).
I assume drinkers just tend to go to places where people drink like pubs, clubs which I've never been to. I'm sure non-drinkers tend to be rare there.
Also assuming that drinking might correlate with sociability there could be a friendship paradox style thing going on where people you know are much more likely to be drinkers.