Spotted this

http://www.asiatraveltips.com/news05/612-Smoking.shtml

Westin Hotels in the U.S., Canada and the Caribbean will go 100% smoke-free including all guestrooms and public areas from January 2006

I notice it doesn't apply to Asia

I would have thought other hotel chains will look long and hard at their market research and if their is a whiff of success on the part of Westin others, surely, will follow suit quickly