Yes, it's quite normal to bring your own bottle in Phuket Town and all the bars don't seem to have a problem with it. I only drink Whiskey when i'm out so i've only bought Chivas, Red, and Black. Chivas and Black are about the same price around B1,500 and Red is around B800 or so. Of course this is Phuket Town prices as i've never bought a bottle in Patong before since I never stay in one place long enough to finish the bottle. Always seem to move from place to place quickly when in Patong.
I've brought my own bottles quite a few times in town but I always think it's horrible for the bar as alcohol sales are obviously the main stay of any bar business and how do they make money if all their customers don't buy any booze from them?? How much money can they make off selling mixers and ice? Where's the customer loyalty?