(authoranon can feel free to just handwave how they all get together and why everything is okay now, because this is a request for pure silly fluff)

Being that Rey was alone on a junkyard planet, Finn was indoctrinated by an army, and Kylo was brooding behind a mask, they don't know much of galactic pop culture. And they don't know the simple, small joy of doing chores and just happening to hear one's favorite song come on the HoloNet music channel.

So Poe is going to show them how it's done.