This is not bad advice. I'm naturally a bit reticent, but a beer or two and I'm chatty and can break through some social barriers. (There's a limit of course, moderation is best.) People call drinking a "crutch" but it's no more so than any other self help advice; alcohol can break down some inhibitions and lead to interesting conversations. (I've heard pot works similarly though I've never used it for social disinhibition myself.)