Back in the day, my friends and I played Ninja. We dressed in black and camo, and used weapons made of PVC tubing and pipe wrap. We usually divided into teams and played "capture the flag" scenarios. We played at night in deserted farmland, sneaking around in the darkness, pretending we were Special Ops Forces and whatnot.
One guy brought his girlfriend, who proved to be just as capable as us guys. I told her she had "Twisted Steel and Sex Appeal." She loved my description of her so much, she put the anagram TSASA on her personalized license plate.