I've been a Marriott Rewards member for several years now, Platinum for the past three. I had never stayed in a Ritz-Carlton property before this past summer in Moscow, and I have to say I was pretty disappointed that lounge access was not included for Platinum Marriott Rewards members (though they did graciously give us an upgraded room with a great view!).
I understand that Marriott Rewards members are not included in the free lounge access that Ritz-Carlton rewards members receive, and that you can also freely switch your accounts between Marriott and Ritz-Carlton. My question for you all is whether you can switch your account just before you stay at a Ritz-Carlton, receive the benefits of your platinum membership for your stay, and then switch back to the Marriott program. Has anyone ever done this?