They should hold the Penguins cup at PPG. Even with the arena mostly empty I guarantee most kids would rather play there. When it is held at the UPMC rink there is no parking and no where to sit.
Pittsburgh sports fans only tend to be fans when teams do well. Watch what will happen to the Steelers once they go further into the toilet. Tickets become easy to come by. The other thing to remember when comparing football and hockey is the Pens play 40 plus regular season home games while the Steelers play 8.