Two old guys are talking in the pub.
One says '' Look at my new membership card! I just joined the Prostitute Club''
His mate replies '' let me see that card, I have never heard of a club like that before''
He hands over the card and his mate takes a close look at it.
''You need new glasses you twit, this is not a Prostitute Club, you have joined a Parachute Club!''
''Oh Sh!t'' says the first man ''I've paid for 100 jumps''