At some point, the Starwood Lurker posted a list of all Starwoods that were officially classified as resorts and convention hotels (for the guaranteed late checkout and perhaps other purposes).

There were many surprises, including some places that I would have thought were considered convention hotels but officially were not.

IIRC there was also a discussion about whether having the word convention or conference in the title meant that the hotel was officially convention property and whether the absence of such words means that it isn't a convention property, but I don't remember the conclusion.