If you are looking to fight someone soon, well you are in lucky, because there is now an app for that.
Rumblr, which describes itself as "Tinder for fighting," is a new app based on the cult classic Fight Club. The app promises "casualty-free casual fighting for free.
However, if you aren't interested in fighting, you can always attend and watch fights closeby. I don't know anyone who uses this app, nor have I seen this app in the iTunes app story but, it will be interesting to see where this goes.
"Rumblr is an app for recreational fighters to find, meet, and fight other brawl enthusiasts nearby. You don’t need to fight to use Rumblr. With Rumblr Explore, anyone can browse and attend fights close by that other Rumblr users have arranged - all for free!"