The certs are either CAT 1-4 or CAT 1-5, hence it will NOT work on a Ritz Carlton as they are on the Tier 1-5. For JW, if you can find one that with the CAT of your cert, then yes, you can use it for the stay.
Thanks, I got the 1-5 cat and thinking of going to Honk Kong. The JW is @550 a night. I guess if I spend 160.00 for a two stay will save me like 390.00 Anyway the promotion runs until labor day so time to plan.