Casino...food...drink...that about covers it. I suspect it was cashable as well, and there's nothing on the chip to indicate otherwise. NCV's usually have wording like "No Cash Value", "Non-Negotiable", "Playable only", or some such. Since this one doesn't, I wouldn't consider it an NCV. As Gene says, though, we will probably never know. Find some former World Airlines employee and ask if they remember [g].