Celeb-filled Second City benefit shows to support local families
December 16 is a significant date in showbiz history. Yes, it's the birthday of some guy named Ludwig van Beethoven. Equally important, it's when Second City officially opened for business on a seasonably mild night in 1959. This year, it's also when the venerable comedy theater will host its 13th annual 24-hour improv-and-music marathon dubbed "The Second City That Never Sleeps." The post Celeb-filled Second City be…