Every admin is a gang leader They then Pick up to four other members on this site for the rest of the gang. Gang leaders can change members ever 6 months( making it so that you can't just pick the very best when ever). If you choose not to fill all the gang slot up at once then you can pick to fill them up when ever. (only time the 6 month rule is ignored). Once a month there will be a gang war, a tournament so to speak.
Say there are 4 gangs tournaments would run like this.
gang1
vs
gang2
--------------
gang3
vs
gang4
The gang leader would select who plays in what order.
Please ask if you have anymore questions.