Not really a luxury hotel, but used to be a regular guest at an IC in Asia. Arriving late one night after almost 30 hours of traveling, with a rather important meeting the morning after, just to find my suitcase had gone missing. The excellent Club staff told me to go to bed and not worry. When I woke up the next morning, a shirt and suit (that fitted almost perfectly) was waiting for me. I still got the suit and the hotel never wanted any money for it.