Exactly the point, you can drink in a "cultural" way. There are actually very different drinking cultures. (As there may be different programming cultures?)

Drinking can even become a bad habit. Or someone can become an alcoholic and could still see it as a culture (read Charles Bukowski.)

A culture in any case is something very artificial and not very well defined in most cases. Everybody can simply declare to be part of a certain culture or redefine his own culture at any point. So now there is a 501 culture...