NYC here and we would say foy-er.
I've noticed that people in the UK tend to use the pronunciation of a term's original language.
Some years ago we were on a ship. The theater was named after Vincent Van Gogh. Here, the name is usually pronounced Van Go. When making announcements about the day's schedule, the English Social Director always referred to the place as the Van Khok Lounge. There were people who had a hard time finding the place for a day or two.
But then, when referring to a self-serve display of food in a restaurant, most People in the US would call it a 'Buff-AY' while those in rhe UK would call it a 'BUFFette'
Ah, the glories of the English language.