Three old men are sitting on a park bench. The first says "Windy, innit?"

Three old men are sitting on a park bench. The first says "Windy, innit?"
The second says "No. Thursdy."
The third says "Me too. Let's go for a pint."

This joke is about a series of misunderstandings. The first one is when old man number 1 says "windy", and old man number 2 hears "Wednesday" instead. His reply contains the word "Thursday", which old man number 3 mishears as "thirsty".

this joke would work with 2 old men if you wanted to reduce the cognitive load.