At 7:30 p.m., Friday, the final weekend of the Spencer Community Theatre Mainstage season will begin when the curtain rises of the fast-paced, manic comedy, “Lend Me a Tenor.” The Tony Award winning comedy by Ken Ludwig, takes place in a Cleveland hotel suite. Set in 1934, world renowned tenor, Tito Merelli (Steve Deutsch), has signed on to sing the title role in Pagliacci at the Cleveland Opera Company.