Think about this:
A union boss at a convention in Las Vegas decides to visit a local brothel. He asks the madam, “Is this a union house?”
“No, I’m sorry, it isn’t,” she says.
“Well, if I pay $100, what do the girls get?” he asks.
“The house gets $80 and the girl gets $20.”
Mighty offended by such unfair dealings, the man stomps off in search of a more equitable shop.
Finally, he reaches a brothel where the madam says, “Why yes, this is a union house.”
“And if I pay $100, what do the girls get?” he asks.
“The girls get $80 and the house gets $20.”
“That’s more like it!” the man says. He looks around the room and points to a gorgeous young redhead. “I’d like her for the night.”
“I’m sure you would, sir, but!” says the madam, gesturing at a 70-year-old woman in the corner, “Ethel here has seniority.”