Ick. What's with you people, finding your courage in bottles? It's FUN. If you can do it with three drinks in you, you can do it with zero drinks in you.
I've had to go on stage to do some stuff. Several times. Actually, many times. The largest crowd?
Over ten thousand. And I'm not great at that stuff, but you know what? Fifteen minutes after I leave, everyone is focused on what's going on on stage NOW, and I've retreated far to the back of their brains. So there's really no pressure, especially when you're in a karaoke bar with only thirty semi-drunk patrons around. Fifteen minutes after you leave the stage, nobody outside your group will remember you were on it. So get up there, fucking sing your balls off, and have a blast doing it already.
Lex