I had the same idiotic idea for my son’s 6th birthday party.
8 boys, two hours, a load of old-school party food. This’ll be a great laugh I thought.
They had no interest in organised games whatsoever. You need girls for that.
When we went outside to play tig, hide and seek and British bulldog (I know, I know) I spent the whole time stopping them from swinging garden implements at each other and trying to prevent one kid in particular from repeatedly hoofing me in the balls.
Our house has a vulgar big conservatory with a couple of big sofas in it, so I ended up getting Mrs Tyred to clear anything breakable out of there, then just took them inside for a mass cushion fight/wrestling match. They just wanted to fight me. Once we were doing that, and we’d established what was OK and what wasn’t, it was fine. Boys of that age have a stupid amount of testosterone, and its worse when a bunch of them get together.
No way would I do that again!