Those who live south of Tours and habitually travel up the D50, via Ligueil, to get to the city will know this place. It is where you turn right at the lights to get on the old Route Nationale (now the D910) at Veigné. (Anyone who relies on Google Maps for directions will now have no idea where I'm talking about, as convincing Google Maps to take the route that everyone actually uses here is nigh on impossible.)
Inside the restaurant there is a roof slate hanging on a post. Written in chalk on it is the message 'Ici à la Folie, les ardoises sont sur le toit' (literally, 'Here at the Folly, the slates are on the roof'). It's a slightly cryptic way of saying 'Please do not ask for credit as refusal often offends'. I would have liked to take a photo, but didn't want to seem too weird and foreign, so I didn't. It occurred to me that the slate could send another message too -- 'here at the Folly we don't go in for poncy food presentation.'