There are many different ways of defining drug use- recreational drug use would be for pleasure, but non-medical drug use would include people using drugs to get rid of pain that have not been prescribed or are not intended for that purpose, etc. However, neither are applicable here. It's simply a case of someone liking the effect that drinking a few beers has on him, and I get no sense from the sentence that the person has any alcohol problem. He's not a druggy person because he doesn't consume illegal drugs for pleasure- he drinks beer. the speaker is differentiating beer from illegal drugs.
PS I would definitely call opium a drug- it doesn't have to be purified into heroin, etc, to become a drug- plant or powder, it's still a drug.