Hi kosacha -- welcome to the board.

Brewer has the sentence "Most nations have some locality renowned for fools -- [Do you want me to go on?] -- and cites the term Gothamites for inhabitants of New York. Washington Irving is quoted as calling New York 'Gotham' in his Salmagundi (1807).

And, for Bingley, the following is cited as a nursery rhyme:
Three wise men of Gotham
Went to sea in a bowl,
If the bowl had been stronger,
My story would have been longer.

And, for jmh:
The village of Gotham in Nottinghamshire was proverbial for the folly of its inhabitants and many tales have been fathered [why not 'mothered'?] on them, one of which is their joining hands round a thorn-bush to shut in a cuckoo.