I was perusing my Amazon recommendations when I came across a book on Pidgins and Creoles (languages of generally of low prestige that develop from other langauges). Now I don’t have an opinion of this book because I haven’t read it, but in the editorial reviews Amazon included, I came across this quote that comes from the book itself:

“Most of the Spanish I speak was learned from drunks in bars. In fact, drunks are the world’s most underrated language teaching resource. The stereotypic drunk speaker slurs his speech to the point of unintelligibility, but in real life this happens only in the final, immediate-pre-collapse phase of drunkenness. Prior to that, drunks speak slowly and with exaggerated care, because they know they are drunk but don’t want other people to know. Moreover, since they’re already too drunk to remember what they just said, they repeat themselves over and over, and don’t mind if you do the same. If you’re gregarious and a drinker, it’s by far the easiest way to learn a new language.”