Oh yeah. That happened during a nasty storm at the restaurant once. The lights went out at, like, 10.30. We had to rush everybody to pay because the back-up power only allowed us, like, 8 minutes to use the credit card machines and the POS units. All the servers were going crazy trying to handle their checks. People were escreaming. The manager was flying off her rocker trying to override stuff. Nobody had flashlights and everybody was using phones to see in the pitch black kitchen. For some reason, all the customers were kinda content, all like, "Lights out. How romantic! Let's casually finish dinner and then have a peaceful moonlight ride home."
What a night. We ended up staying way late because we had to calculate all or sales by hand before the end of the night. Nobody had a calculator. We were servers, you know, not the smartest species of human on the planet, so everything was messed up.
It almost provides evidence that restaurants shouldn't open during tropical storms, but you know what's more important than time? Money. Time is money. Bees make honey. And clowns are funny.