A dedicated union worker was attending a convention in Las Vegas and, as you would expect, decided to check out the local brothels nearby. When he got to the first one, he asked the madam, "Is this a union house?"
"No," she replied, "I'm sorry it isn't."
"Well, if I pay you $100, what cut do the girls get?"
"The house gets $80 and the girls get $20."
Mightily offended at such unfair dealings, the man stomped off down the street in search of a more equitable, hopefully unionized shop.
His search continued until finally he reached a brothel where the Madame responded, "Why yes sir, this IS a union house."
The man asked, "And if I pay you $100, what cut do the girls get?"
"The girls get $80 and the house gets $20."
"That's more like it!" the man said. He looked around the room and pointed to a stunningly attractive blonde. "I'd like her for the night."
"I'm sure you would, sir," said the Madame, then, gesturing to an obese fifty-five year old woman in the corner, "but Ethel here has seniority."