Heard an interesting conversation between two young ladies as they walked passed me and entered a club on Tuesday night. One of them said to her friend "So, you'll keep buying the pints until I have to pee?"
Her friend replied, "Yes, the longer you hold it the more pints I have to buy. When you've had your first wee you then have to buy the pints for the rest of the night."

Sounds like an interesting game!!!