Maybe a stupid question but I have my first Marriott Resort stay coming soon, at JW Cancun Resort. How do I check if there is a separate resort fee? And if I as a platinum get free access to workout facilities, etc?

Sorry, but I become worried when I saw this thread. I had never even thought that there might be a separate fee on top of the nightly rate itself. Neither did I ever thought that workout facilities might NOT be free to everyone?