I think regional accents and dialects are great. Can create some really good humour like the above tales. Can use it in almost any region as well but I suspect they will loose something if you don't know the accent. Try -

Black country

Customer: I'd like to buy something to go to a 60's evening in please
Assistant: How about a kipper tie?
Customer: Yes please, milk and two sugers...

or Edinborough

Customer: Is that a sponge cake or a merigue? Assistant: Aye, it is sponge cake and yer nae wrang...

Cheers

DtG