Just visiting here. A few years ago The Spectator carried an article on the best free meal available in London, and how to get it.
Buy a first class ticket London to Paris on Air France. Schedule the flight conveniently around lunch time. Arrive early. Check in. Proceed to Air France first class lounge. It has, or at time of reporting had, the very finest cuisine, free to passengers. I cannot recall the details, buffet or otherwise, but it was described in glowing terms. Eat meal. Enjoy drink. Place call to home office in London. Learn to shock and dismay that you have to return there forthwith. Return to check-in. Express regret. Cancel flight. Receive refund. I have never tested this myself, since it is dishonest and I do not live on the relevant continent anyway, but such was the report. The experience gave no evident moral qualms to the journalist.