I haven't been to Thanksgiving dinner at any of these places, but I have eaten at both the Sheraton Grande Sukhumvit and the Four Seasons. The former wins hands down, and based on their excellent Sunday brunches that include a number of roast meats, I'd choose them to roast my turkey. Also based on Sunday brunch experiences, it may be a buffet, but it's one heck of a buffet. Recommended. The food at the Four Seasons on the other hand has been more often disappointing than not. (Completely unrelated, but writing this also reminds me that the FS barber shop is a disaster. A friend of mine left there bleeding once, not a little nick, but like something out of a mad slasher movie.)

If you have access to a kitchen, Villa Market already has a bunch of Butterball turkeys in the freezer. I am still on the look out for an unadulterated turkey for my Thanksgiving celebration. I'm guessing that they will be easier to find as the date approaches (unless we're all on rafts floating out to the Gulf by that time).