new rule: audience shall not clap 20 seconds after the song begins, and shall remain quiet until the song has concluded, or the performer makes an obvious and reasonable (and deserved) call from the crowd for participation.
this goes to you Old Timers. you havent heard the song in 20 years, you forgot the first verse… when he hits the refrain you finally realize that the song he’s playing is track 2 on his greatest hits… too late! you missed it. let it go. why interrupt a song to let everyone else know that you just figured out what song it was? you should be embarassed. sit in silence as punishment and hopefully he’ll play that song that once made you think you were the deepest twenty-something around. or just clap earlier with the rest of the real fans.