That’s LARPing, or live action role-playing. You’ve probably seen it before in movies like Role Models, or Knights of Badassdom
Now, no offense to those who enjoy it, whatever floats your boat is cool with me. But when you stick “weapons” in the hands of people who typically aren’t the most coordinated bunch, you can kind of expect what’s going to happen.
FAILS. Glorious, glorious fails.