I also believe that shows that perform from a touring group are those that are ultimately planning to stop in NY for a run. Busker Alley, Bye Bye Birdie, Showboat were all shows slated to come into NY eventually at the time of the broadcast. Certainly not a rule, but just my thought on the subject.
The truly beautiful should be lawfully restricted from wearing clothing; and the truly butt-ugly should be lawfully mandated from going naked.