Mr. Boston

[snopes]

Comment: I've heard the story where a person in Boston said he could find
an open parking place right in front of the building he was going to go
into, at any time, on any day. So the local newspaper challenged him.
They would call him and tell him to park, let's say, in front of the
courthouse (or any other place that was notorious for parking spaces
always occupied). And it was a random time, a random day. And he did
find an open parking place right in front of the building they would send
him to. He was given the title Mr. Boston. Since then, any time you find
a parking spot right in front of where you want to go (busy mall, local
courthouse, etc.), it's a Mr. Boston.