It's in the stage directions in the script: It's funny because they each say they're doing something unique, but in the end, they all do the same bumps and grinds that every stripper did.
Funny stripper story: Arthur Laurents, the Bitchiest Man Ever to Work in the Theater, infamously turned on director Sam Mendes during previews for the Bernadette Peters revival.
Despite knowing that Arthur was saying awful things about him all over town, Mendes still wanted Arthur's approval.
So Sam called Arthur one night after the performance to tell him how well it had gone and how much better Bernadette was getting. But nothing could change Arthur's mind: The production was a debacle.
Finally, near defeat, Sam said, "Well, Arthur, the strippers got a big hand."
"Oh, please, Sam" Arthur said. "ANYONE can make that number work. You could cast Saddam Hussein and his two sons as those strippers and they STILL would get a big hand. Good NIGHT."
And with that he hung up the phone.