A FTer who lives in Thailand emailed me saying the same thing as paolo64 - ie, no restriction on the sale of alcohol. He subsequently emailed me this (realize it's not SPG, but assuming SPG properties will be similar): "I'm at Pattaya Marriott since yesterday and happy hour in full force last night and bar open at 10am today."
Also, the OP posted the exact same question in the Marriott forum.
Cheers.
Last edited by SkiAdcock; Oct 14, 2016 at 2:49 am
Reason: add the info about Pattaya Marriott