Sorry to say that Harrah's (can't get used to saying Caesars)casinos in AC no longer will give a Diamond card if you show a VIP card from another AC casino. They did it last year, but I wasn't able to do it at Showboat & Harrah's this week. My wife was still able to get a Black Lable card at Borgata by showing a Taj Chairman card.
Good luck to all from Bob B.