Niles: Frasier, Frasier, forget it. We'll just- We'll wait for another table.
Frasier: No, we won't. This isn't about the table anymore. This is about the erosion of common decency. Sir, when you treat me this way you encourage me to be discourteous to another. And so on and so on. [the man ignores Frasier] You don't have any manners, do you? Then perhaps what you need is an etiquette lesson!!
[Frasier lifts the man up and drags him out of the store. After Frasier returns:]
Frasier: Sit down, Niles.
Niles: My brother will have a decaf.