Maybe this should be looked at, like size restrictions on getting on a amusement park ride. The good news is there is a bar and restaurant there so staying there while the elevator gets fixed should be just fine.
Or they could put in a stair lift for emergencies...
“Medical conditions.” Just say it: A bunch of fatsos who can’t make it up a flight of stairs if their life depended on it. Drop down some farewell pizzas and pave it over. Like the modern American version of an Egyptian tomb.