We recently spent a wonderful 10 days at the JW/Cancun and upgraded using $$$ to Club 91. The five food preps per day were wonderful and we decided not to venture out to other restaurants. Staff in 91 and throughout the JW could not have been better, spacious rooms, great pool(s) area and the white sandy beach, narrow given destruction of Wilma, was wonderful. We used the JW as our destination and would come back again. Great fitness center and marvelous spa. Highly recommend.
I inquired about the club 91 directly and upgrades to have access is about 150k points. I am a gold member and so, not sure if that was the case for me or not...either way, it was a bit pricey for me~ have fun.