I also sequence my collection alphabetically, without regard to casino location. My Harrahs from everywhether are together.

I still have a problem of collecting Harrahs cards by member-number prefix as it makes for an almost unlimited number of combinations... basically n-squared, where n is the number of Harrahs locations that ever existed. I still feel that collecting unique cards as issued by the casino is the most satisfying protocol. I don't care to have all the location codes for every physical card variation in my collection. However, there are some really fanatic Harrahs collectors out there... for chips as well as cards and other artifacts. Whatever you can afford and gives you pleasure is my motto!