This television episode refers to:
October 15, 1999
After returning home from the Teen Choice Awards on Meg's 18th birthday, Meg asks why there are so many cars parked on the street. Peter lets it slip that they are there for her surprise party. However, when the Griffins enter the front door, they see the house is empty. It turns out the cars are there because Mort is having a "Jewish Fight Club" where the first rule of Jewish Fight Club is that if someone says "Ow!", fight club is over.