I always read the name as “Pet a Manager” which makes me never want to step inside one.
Perhaps they could have done like Panera and renamed themselves to something that wouldn't upset easily confused American diners?
English misreads confuse everyone, not just Brits and Americans, because for better or worse, English is the international language. Lingua franca, to make an obvious pun.
We could just say 'common tongue', but that's just not the English [Language] way - far too simple.