Patrick, plainly speaking, was going to the staff lounge to get away from the children. You would've thought there would be a ton of places he could do that, but they were freaking oozing out of the walls (literally as far as the ghosts went) and the lounge tended to be a bit of a safer place. Usually.
He was expecting to get peace, but got entertainment instead when he opened the door to find Adam sprawled out in a chair, snoring like he was going to choke on his tonsils or something. Patrick waited for a moment-- totally out of politeness-- to see if Adam would wake up on his own. When Adam didn't wake, Patrick kicked the door shut so that it slammed. Loudly.