Originally Posted by Moriens

The two “Casuarina” Westins (Las Vegas and Grand Cayman) are operated by Columbia Sussex, Starwood's worst licensee.

But you should be aware that they also operate a few other SPG properties:

• Sheraton Baltimore City Center
• Sheraton EWR
• Sheraton Philadelphia City Center
• Westin Casuarina Las Vegas
• Westin Chicago Northwest
• Westin New Orleans
• Westin San Diego
• Westin Tampa Harbour Island
• Westin Washington DC
• Westin Bristol Place, Toronto
• Westin St. Maarten
• Westin Casuarina Grand Cayman

Beware!
If you must stay at one of these hotels, bring a printout of your reservation!
Check your credit card statement!

(Even that might not be enough; once, when a conference operator went bankrupt, the Westin Las Vegas tried to add the cost of the conference to the bill of every overnight guest who had bought a conference ticket.)