Nicholas told us that this is played in Pouancé, the nearby town, every Sunday at a court behind the library.
Neither the Old Bat nor I could recall ever seeing a library in Pouancé or signs indicating where it might be hidden, so the very next morning, after I had visited the boulangerie, I set off to seek le bibliotheque. It was not marked on the street plan in the centre of town, although seemingly every other vaguely public building was indicated, so I drove the streets looking for clues. I had no luck whatsoever. However, I did spot a red English telephone kiosk like this