Looking for overview and comparison of Casino memberships

I am looking for information on comparable information to the NCL Casinos at Sea membership/program. We can get some great deals (often free) on NCL because of my husbands Casino play and was wondering if there were comparble programs on other cruise lines.

So - if anyone has experience on multiple lines on their Casino memberships/perks it woudl be great to have that discussion here.

I gamble in Atlantic City at Trump and received a free cruise on Princess from them. It was wonderful.

Tomorrow I am going to Harrah's to pick up a NCL certificate. I have never cruised NCL before.

There is a big partnership between Mlife and Royal Caribbean's Crown & Anchor now. There is now status matching between the two in that status in one program will qualify you for recognition in the other.

If, for example, you are Emerald or Diamond with Royal Caribbean, you can get a Gold Mlife card. Mlife tiers offer certain benefits onboard Royal Caribbean ships.

I can't find a good web site that details the offers between the two. It's been discussed in the Royal Caribbean forum, but I didn't find a definitive thread to link here.

It's something worth exploring if you're a member of either program.

Here is a discussion the Royal Carribean / Mlife match offer.