Then they decided to hire a butler.
They found the perfect butler through an agency, very proper and very British, and brought him back to their home. The day after his arrival, they instructed him to set up the dining room table for four, as they were inviting the Cohens to lunch. The couple then left the house to do some shopping.
When they returned, they found the table set for eight. They asked the butler why eight, when they had specifically instructed him to set the table for four.
The butler replied, "The Cohens telephoned and said they were bringing the Blintzes and the Knishes."
A tip of the kippah to Linda Englander for bringing this joke to our attention.