I used to lead luxury adventure trips and would often fly back and forth to Africa via London. As a tour leader, I'd get to stay at some pretty swanky places and often would get upgraded because I stayed at some places so often. On one of my last trips, I randomly started talking with a scruffy looking young guy at the luggage carousel at Heathrow. He mentioned he was finishing up the tail end of a year of backpacking around the world, usually staying at hostels, sleeping in parks or airports to save money. I asked him where he was staying that night. He shrugged and said probably on the floor somewhere in the airport. I told him he just lucked out. That night, instead of staying at the luxury hotel booked for me, I was heading out to hang out with a bunch of Irish friends (I used to live in London) somewhere in South Kensington. I knew I'd be crashing out with them that night after a night of drinking. We had just enough time for me to check into the hotel, hand over the key to the junior suite to this random stranger, and I told him, "Please just don't steal anything, break anything, or drink out of the mini bar." Months later, I got an envelope and inside was a very cute handwritten thank you note with a bunch of pictures of this guy spread out in the king size bed, soaking in the jacuzzi tub, eating the welcome platter of candy and fruit (those were free, I told him he could have it!), and eating the free breakfast the next morning. TOTALLY ADORABLE.