Step one: Beau hides himself somewhere he won't be noticed
Step two: Peter comes in the room all tired like and asks, "where's the cat?"
Step three: I reply, "I don't know. I don't think he's in here. I haven't seen him in a while."
Step four: go to bed
Step five: Cat waits twenty minutes then starts making trouble.
Step six: measures are taken to de-cat-ify the room
Step seven: Cat RESISTS RESISTS RESISTS
The ritual ends when one of the humans shakes the cat food container, because no matter how full the cat's food bowl might be, the sound of cat food shaking around in plastic is like a furball magnet... it never fails to draw the cat out of the restricted zone.