Tuesday night we went to High School Musical on Tour (the Paramount, through May 25). We have up until now stayed completely ignorant of all things HSM, other than knowing it was a surprisingly successful movie musical produced by Disney that had a Shiite-like following among the Hannah Montana set. Its success surprised even The Mouse, who quickly created a franchise that includes HSM 2 (soon to be HSM 3), HSM on Ice, and this......