Serious question: What is the purpose of "drinking all night" and not getting drunk? To me, the phrase "all night" implies "a lot" or at least "relatively frequ

Serious question: What is the purpose of "drinking all night" and not getting drunk? To me, the phrase "all night" implies "a lot" or at least "relatively frequently during the course of the evening". Why would you want to drink a bunch of alcohol and not get drunk? If not becoming drunk was the goal, why wouldn't you just, you know, drink something non-alcoholic?