Four men are waiting in the waiting room for a maternity ward (yes, 
yes they no longer do that but if we brought the joke up to date 
then it would not be funny, you see).
     
The nurse came out and told the first man, "Congratulations!  You're 
a father of twins."
     
What a coincidence!" the man exclaimed. "I work for the Minnesota 
Twins baseball team!"
     
The nurse returned a short  while later and told the second man,
"You are a father of triplets!"
     
Wow, what a coincidence! I work for the 3M Corporation!" he exclaimed.
     
When the nurse came out again, she told the third man that his wife 
had given birth to quadruplets.
     
"Another coincidence! I work for the Four Seasons Hotel!" he said.
     
At this point, the fourth guy fainted.  When the other men revived
him they asked him what's wrong,
     
He said "What's wrong?! I work for Seven-Up!"