Clan or Guild
There should be an option in the "Activity" called "Guild Wars" where random selected players from different Guild gets sent to a battle field to battle for Guild rank points.
Also the more points you contribute the higher you get up in title in your Guild. Let's say you start off as a "Beginner" in your Guild and after you have contributed 1,000 points you are promoted to a "Trainer" and so forth.
If anyone thinks this may actually be a good idea, an idea that could increase the social experience in the game please give this suggestion a +1.
*Positive comments only*