Marriott Bangkok Resort and Spa
Just returned from this Marriott (and the Marriott Resort in Pattaya). Both properties are just simply amazing.
The property in Bangkok is a 15 minute boat ride from your skytrain stop and runs every 20 minutes (I found that a great way to end the day and relax on a short river cruise) the Lounge there is absolutely amazing.
Property in Pattaya was also amazing and the lounge there was also amazing.
If only the lounges in America were 1/2 as nice as these in Thailand, I'd solely stay at Marriott properties!