How do you hook up an Xbox 360 controller to another persons Xbox?

If you look on the front of your 360 console, you should see a small white button next to the Memory Unit B port. If you press this button, the lights around the power button should start to blink or rotate. This means that the XBox is looking for a new controller signal. Hold down the power button on the controller for a few seconds and it should sync with the console. After that you should be good to go.