In this example restaurants are more like npubs, not relays. If you want to parable relays, you should say city districts that only allow restaurants that serve only meat 😉.
No, npubs are guests inside the restaurants if you want to take it there. A similar analogy was used in some podcast now that you mention, I think it was on TGFN, where they use the analogy of relays as houses
Fuck you. I think I am European.