ritz carlton used to have fitness class for non members (2 yrs ago it was 35 QR per class). I used to go to some of the classes and they have late classes too. Last time i heard their 2 rumanian ladies instructors plus 1 mexican instructors all resigning. Then the activities stopped. They planning to bring a new instructor from Jakarta and put the activities back on track again. Why dont you call the hotel and ask. Mind you if you live in the other side of town it would be a pain driving through the traffic.