Time Out says
Brewski is currently the highest beer bar in Bangkok
The rooftop offering of the Radisson Blu Hotel is currently the highest beer bar in Bangkok, offering guests an opportunity to sip a variety of malted brews while enjoying stunning skyline views.
Brewski features 12 draft beers from around the world on tap, such as Californian Summer Solstice (a smooth cream ale with 5% ABV) and The Wild Turkey Bourbon Stout on a rotation basis. Prices per glass start from B70 for a 100ml serving, but you can also opt for 250ml and 470ml sizes.
Radisson Blu Plaza Bangkok Hotel
Soi Sukhumvit 27