The Simpsons S13 E03 Homer the Moe

"Just a product of society that's lost its good manners."

Moe becomes depressed and decides to return to bartending school so he can re-evaluate himself. He meets an old teacher, who suggests that Moe try improving his bar, which might make him happier. Moe takes the advice, and turns his bar into a trendy nightclub, which does not sit well with his regular customers Homer, Lenny, Carl, and Barney.