There is a good chance that no matter your income level or where you live in the world, you have appreciated bowling to a certain degree. If you have ever been a little bit good at it (like me) you can probably enjoy not understanding how people are "professionals" in this "sport"... and that is where this movie comes in.
This is NOT a great movie, but if you are in the right mindset, it is a group of exceptionally talented people who are trying to have some fun using a medium that there is a good chance that everyone in the world has probably experienced. Bowling is a game that anyone with a couple dollars can have a go at. I don't know if you have ever met anyone that ever took the sport too seriously, but this movie really really really takes the piss out of those people. Everyone is a bit fat, they all have bad hair, they have very little in the way of social skills, but they just happen to be very very good at bowling.
The story is irrelevant. It's a movie about bowling and it has Woody Harrelson and Bill Murray in it. Do you need to know more? For me, pretty much anything Murray is in is worth watching and this one is especially good because him and Woody are actually friends in real life.