Whenever there is a fancy dress party - usually impromptu - everyone turns up wearing the most amazing costumes.
No one ever gets through to an engaged phone.
Everyone knows everyone else's phone number - even those they have only just met, or who are "enemies".
How big are the local precincts and do businesses open and close weekly? They are always going to "the new Italian in the precinct". No one ever seems to go back, nor does the Italian ever cease to be "the new Italian" and just become "the Italian".
Heinous crimes against other residents are always forgiven and the perpetrator rarely leaves under a cloud. For example, Kevin Webster forgiven by, and in business with, the husband of the woman he had an affair with and had a child with.
No one ever lives on benefits. No one is ever unemployed - as has been mentioned, as soon as someone needs a job, one miraculously opens up. They get offered work at the drop of a hat, without any discussion about hours, pay etc. And they start working on the next shift with a perfectly fitting uniform.
When going to investigate a strange noise in a house, (usually when the occupant is alone), they NEVER switch a ruddy light on, and stumble through the gloom.