It all goes back to zoning laws and regulations.
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That said, there are probably 0 employees and long hours involved.
It also doesn't have to be your primary source of income. If you can run it from a structure like this you could just operate a cocktail bar on the weekends. Even in the US I know of a small pizza place that offers takeout only on a few days each month and it's operated out of the owners mom's kitchen. Not sure how legal that is and turning that inti a sit-down place would certainly be an issue.