When I visited England, I had the pleasure of meeting Mr. Alun Jones of the College of Medieval and Rennaissence studies, in Oxford. He had an intimate knowledge of every pub in the home counties. Which meant he could warn you about the ones that didn't welcome Americans.
It would be simpler if they incorporated their views into the pub names.
The Trainer Free Zone
It's A Jumper You Git!
I Am The Barman Who Ignores Americans
The Starless and Stripeless