Summer Party Theme Name Question6

This question test your sense of humour to find the Summer Party Theme Name that works best for you. What Do You Think of This Joke?

I saw a guy at a party wearing a leather jacket and I though, 'That is cool.' But then I saw another guy wearing a leather vest and I thought, 'That is not cool'. Then I figured it out: 'Cool is all about leather sleeves.'

Funny Not Funny