A friend of mine works in a restaurant. She told me that one customer called beforehand and told them she wanted a birthday cake brought to the table. No problem. And she wanted all the staff to gather around to sing Happy Birthday. Ah, well, maybe one or two can, but they do need to serve other patrons. But here's the kicker.
She wanted them to turn off all the lights in the restaurant when they brought the cake in. Um no. Just no. Apparently she got very argumentative when they explained the massive health and safety violations. Not to mention the comfort and enjoyment of the other diners.