Check out the SCA - Society for Creative Anachronism (otherwise known as the Society for Creative Adultery).
Used to be in that - full suits of armour beating the crap out of each other with rattan weapons (no live steel). Was great fun at the time.... They have the "Pennsic War" near Pittsburgh every year. Last time I went, many moons ago, I was the 8th last one left "alive" (started with 900 my side, 1200 their side) for the Middle Kingdom in the field battle - fell to a "rhino hide" after mashing him 3 times with my pole arm.
It's good fun - you're not allowed to punch people with your pommels, gauntlets or shields - more romantic middle age based than the reality.