Respect the wait-staff. Period.

The accountant and his wife are seated at one end of the table with the lawyer and his wife. At the other end of the table are a group of employees and their friends. The table has shared a few bottles of wine over the course of the evening; the employees and friends have been more conservative since it is the accountant and lawyer picking up the tab. The talk is light and laughter resounds often throughout the conversation, especially amongst the friends. The waiter has come to help one of the friends with a wine selection. That's when it happens.

The accountant's arm shoots up into the air--he snaps his fingers twice, then beckons the waiter from the other end of the table.

The waiter's body freezes for a split second before he continues describing the wine list, ignoring the accountant. While everyone tries to pretend that what happened didn't just happen, there is a moment when you can see everyone's pupils dilate to the size of saucers. A little later, the waiter relents and goes to see what the accountant needed so urgently.

Shortly after he does this, the waiter leaves, obviously agitated. The accountant's wife stands to leave, and assertively suggests her husband follow her. He thankfully does. On his way out of the restaurant, he meets the waiter once more.

    "I asked you for a coffee half an hour ago."
    "I gave it to you, sir."
    "No you didn't."
    "Yes, I did."
    "No, when?"
    "Half an hour ago, sir."
    "I didn't get it."
    "Yes you did. And then you spilled it. It's still on the front of my shirt."
    "I did no such thing."
    "Yes you did. You spilled your coffee on me while paying for the bill, right over there."
    "What are you on drugs?"
    "Good night, sir."

And with that, the waiter turned around, and left the swaying accountant to make his way out of the restaurant, his wife already having left him behind, and everyone else at the table too embarrassed to make eye contact with him.