Will Banana Split Your Sides Laughing

I work at a chain of family restaurants in the northeast US, and this happens about 10:30 pm, a little over an hour before we close for the night. I am working the ice cream counter. A Jim Dandy is what we call our large banana splits.

Me: *To a waitress* “Hey, what do you call a Jim Dandy with no nuts?”

Waitress: “What?”

Me: “A Jane Dandy!”

She tells her customer, laughs, tweets it, and then tells the joke to another customer at carry-out.

Customer: “This is great; you guys should open a bar!”