French hospitality

My friends went to sample the delights of Epernay. On arrival at their hotel, they found a letter waiting for them, inviting them to dine two days later at Chateau Pol Roger. That evening, they went out for dinner at a local restaurant and sat at their reserved table. The waiter approached them with a bottle of champagne on ice, "With the compliments of Pol Roger!" he declared. The following evening, at another restaurant, they were presented with another bottle of Pol Roger. Much bemused, they arrived at the chateau for dinner the next day. It transpired that the chatelaine was a great friend of their brother-in-law and had arranged the whole surprise, to the extent that she'd called all the restaurants in Epernay, instructing them to serve Pol Roger to Mr and Mrs X should they have a reservation!