Even as a Diamond, I wouldn't count on getting an upgrade to a suite (that's very rare) and even more rare for Platinums. That said, if you want to try for a suite, the above advice is sound (contact the property and ask what an upsell to a suite would cost you). Alternatively, sign up for the upcoming "Next Big Thing" promotion (see http://www.flyertalk.com/forum/hyatt...big-thing.html ) which you can sign up for on 9/25 - and starts on 10/1. Just do 2 stays and you should be able to get the 2nd room for free - I'm sure the hotel will accomodate you with 2 adjacent rooms that may connect anyways.