Yeah Yeah Yeahs at All Points West (07/31/09) Photo: Paul Crispin Quitoriano Folks, in the business, they call this an “underplay”. Tickets for the Yeah Yeah Yeahs at MHOW on September 29 go on sale Friday, August 28 at noon. (Tickets will sell out at approximately about 12:01 PM.) Incidentally, September 29 is the same…