Ever walked into an empty restaurant way past lunch, starving for a simple meal because the last one you had was ages ago then praising God to have discovered that the place was empty? You try to appease your rumbling stomach with the promise of a hot plate soon to arrive.
You raise your hand to call the attention of one of the waiters/waitresses that were gleefully chatting with each other in a corner table when you arrived. Upon that gesture, they disperse to different venues of the restaurant: one suddenly rushes to the kitchen and you hear the clinking of dishes as if they were being taken out of the cupboard to be washed again, one hurries to inspect the table farthest from you to see if it's clean, one starts to arrange the seats that were left by her comrades, one, on her way to the cashier, you catch rolling her eyes up as you realize that you have disrupted their most favorite part of the day.
You keep your hand raised for two full minutes until the waiter cleaning the table eventually looks up and tries to fake a surprise to see you seated and waiting to be serviced.
I hate that.
I hate it even more when the girl who rolled her eyes would act cheerfully when you ask for your bill, as if hoping that you would leave a tip. These people should know where tips come from. No, not just from the customers' wallets, but from our gratitude. We know (or at least are hoping) that waiters and waitresses are being paid (enough) by the owner, we're just giving something extra for making the dining experience better than self-service.
"Tip" fyi came from "to insure promptness", so unless you actually accomplished that, don't act sourly when you don't get it.
I hope they would stop treating customers like a self-centered, rich bastards (we're often not) and try better to act more kindly towards us. Most customers only ask for what's reasonable. It's really fine if you don't get us the menu right away since you're still busy taking some other customers' orders, but to make someone wait unreasonably is....well, unreasonable!