I know the Ritz Carlton Singapore does not participate in "The Ritz-Carlton Rewards" program. However, I can't find any information that says they do not participate in Marriott Rewards. I had two stay at RC Singapore last month a want to know if I should ask for my stays to be credited under the Marriot Rewards program.

Both times the front desk agent politely told me that RC Singapore does not participate in the Ritz Carlton Reward program when I gave the agent my Marriott Rewards card. I tried to explain that they are two different programs but the agent re-enforced their position that RC Singapore does not participate in the RC Reward program with no mention of the Marriott Rewards program.

Is there a list of RC hotels that do not participate in the Marriott Rewards program?