Same experience as Virgo 10, but at CR. They hadn't really overbooked, but a tour bus pulled in just before us, and that group had more people than # of rooms reserved. The CM also asked us if we MINDED.
We also got an upgrade to a suite in Toronto when my husband showed up in a cast and on crutches, and we asked about a wheelchair rental for our stay. (It was a business meeting and he had injured his foot the week before; too late to cancel.)
Acquaintances of ours (at a different meeting) got upgraded at The Ritz when they couldn't get a room with a King bed, as they had specifically requested. The only King available was in the Presidential Suite, so that's what they got...at standard rate!