The answer is, YES! There are official multiplayer rules that should easily be able to accomdate 3 or 4 players. Check out page 16 of the current version of the rules at:http://www.decipher.com/resources/rules
Also, you're even further in luck! Decipher has just instituted a 30-day money back guarantee, with no obligation to send your Kilo back
! Now there's a stance that, to my knowledge, no other CCG company is taking. So you've got nothing to lose in trying out Fight Klub, really.
And with the recent release of set Three, the game is actually quite playable. But I'll leave that up to you to decide for yourself.