As a kid, I did the even nerdier kiddie version of this called boffer fighting at organized events. Weapons are PVC piping covered in foam.
The step up from what I did is the different SCA divisions, which is more like this in that the weapons aren't padded and you need armor, and this is exactly the reason why I stopped doing it eventually. Every weapon being just differently shaped clubs encouraged people to do dumb shit like making a sword that's weighted tip-heavy like an axe. You go into a fight expecting one thing and then get almost knocked out (for real) by some douche who's masquerading his "poleaxe" as a long sword for the explicit purpose of faking you out.