BBC: It's a busy Monday night at Whispers strip bar in the oil boomtown of Williston, North Dakota.
A man in overalls drains his glass before showering money on a pole dancer.
By the side of the stage, a half-nude woman is building a miniature house out of folded dollar bills.
Strippers can earn $2,500 (1,500) per shift here, says a bouncer.
But one employee, who goes by the name of Alexis, isn't feeling especially motivated tonight.
She's wearing a woolly sweater because whenever the...