Well, they have to take the money in!
I don't think I've been in a park when there was an outage.
I've had clerks in stores who could get into the register refuse to sell me things. They can't add tax and make change without the register giving them the amounts. I even tried to walk one through it once. It was like, "Multiply by what? Then adding?! Mercy, no! I cannot do that and I cannot trust you because you are trying to confuse me with all this talk of advanced mathematics!" (Not an actual quote, but may as well have been, lol.)