It won't be too hard to imagine this scenario, because it ALWAYS happens: a group of musicians in some sort of rock band are nearing the end of a set. The lead singer steps up to the mic and prefaces the next song with some kind of cheeky nonsense like, "Hey, uh, we made up this song like 14 seconds before we got on stage. It doesn't have a chorus yet and we were stoned when we thought of the first verse. We haven't practiced it-- we don't know what it sounds like yet. So, uh, yeah, let's just see how this goes."
The question for discussion is this: WHY would a band perform a song that they haven't had time to perfect? And why do they think it's cool to tell people that they're about to hear a number that's half-baked?
I'm done. Talk to you in the comments?