More or less, the specific details were brought up to explain WHY the zoning rules exist.
The fact is, the zoning rules exist, and if he was having tupperware parties, 12 year old boy rapefests, or stupid book clubs like he was, it's a violating of those zoning rules, he was getting around the law by using his land for something other than the taxes he paid would allow, it was a perfectly reasonable legal move to order him to stop or apply for the correct permit.
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