How many xbox 360 wireless controllers can work in the same area?

I am planning to host a tournament. I hope to have all the controller wireless. How many wireless controllers can work in the same area without running into a signal problem?How many xbox 360 wireless controllers can work in the same area?
well i would say four controllers to a console but make sure you don't sync them all at once do them one at a timeHow many xbox 360 wireless controllers can work in the same area?
Each controller is synced to a different Xbox and 4 controllers can work to and xbox



so



4 controllers multiplied by how ever many xbox's there are
There can only be 4 controllers on 1 xbox 360 but ask if any of your friends can leand you an xbox also make sure u get a cord to plug the 2 xbox you can only have 2 xboxs for 8 players ask for the cord at best buy have fun!