Oh right...getting back into the recreation area. When you went back up in the elevator you must have climbed out of the top of the elevator. If you go out of the door instead you get to an area with some crates to your left, climb the crates, climb the wall by them, monkey bar your way over the riot guard below then drop down the other side and you'll find yourself back in the Workpass area. Took me until my third time through the game to figure that one out!