“Honey, I’m worried. We don’t have enough food for all these guests.”
“I was thinking the same thing. Did you invite some of them without telling me?”
“No. Some of them are crashers. But which ones?”
Her husband had an idea. He got everyone’s attention and said, “Will those from the bride’s side of the family please stand?” and about a dozen people stood up.
Then he asked, “Will those from the groom’s side of the family stand up as well?” and ten more people stood.
His smile changed to a stern grimace. “Now, everyone standing: leave. This is a birthday party!”