Ping Pong Telling

You know when the bank closes and they shunt all the customers out and close the doors, but then the bank employees stay on and work a while ... Have you ever wondered what they do in there?

I always thought they counted money and stuff like that.

No, they don't. They shove a table into the middle of the big open space, and put a row of those "Next Teller" notices across the middle of it, and play table tennis.

As seen in Wuxi Construction Bank after hours.