Which type of wine are you looking for? Actually there are many good wine bars in Bangkok. If you are the one who's into Italian wine like me, you're recommended for 'OPUS' on Sathorn road. You can check out from their website. They serve wine from every regions in Italy. The most famous is obviously Chianti, Tuscan wine. There are some other places serving international wine such as 'Wine, I love you' at CDC (quite far from the city) and 'Wine me up' at Thonglor. Enjoy sipping your wine!