I don’t think this happens very often, at least it has never happened to me before. It cannot be often you walk out of a café/restaurant with a quickly scribbled walking guide in hand, to make sure you find your ongoing route. Here it is:
Oh yes, and this was at the very nice café/restaurant ¡Déjate llevar! in Tejeda, Gran Canaria. As it turned out, Fernando, one of the owners, was a keen walker as well.