As to the guys who go from jam night to jam night playing the 2 songs they know, that is just a desperate plea for approval from people who are insecure about their talent and ability. Cheap applause from people who don't know good from bad is about as meaningless as it gets. A successful performance to me is when people are enraptured and sit transfixed staring at the stage because the music is so damn good they are mesmerized by it.