The thing that makes me rage when I go out to a karaoke bar is when you get a group of 15 people all trying to share 1 microphone and you end up not hearing anything but the background music and an occasional "Woo!" from the drunk blonde in the middle. If you want to
sing a song, go up there and sing it! Don't say you're too embarrassed or scared to do it by yourself. If you are, then don't f-ing go up there!