This Thursday I'm taking my wife and teenage daughter to NYC for a long weekend at the New York East Side Marriott. I'm using Rewards for two of the three nights and when I got the Virtual Concierge email a few days ago I stated that as a Platinum member that I'd like to request an upgraded room with a king and rollaway. Here is the response I got back from the property a few minutes ago:
"There is a cost of $40.00 plus tax per night for the rollaway. We look forward to your arrival."