At the old ranch in the 'burbs, our record was close to 700 kids at the door. Kept the dogs in the bathroom and the cats locked up in the bedroom. Never got much chair time. Easier just to stand by the door. People would load up a dozen kids in a van and drop 'em off in the hood. Only had to walk a hundred feet to the next house, and there were three roads with a fourth connecting 'em in a trident pattern.
I enjoyed 'em all. Little ones were cute as the dickens, and the teenagers were always a trip. I always made mom or dad take a piece for themselves, too.