Octave Rooftop Lounge & Bar is situated in the middle of the Thonglor area and on top of the luxurious 5 star Bangkok Marriott Hotel Sukhumvit. Although Octave is just outside the center of Bangkok, the sky bar is very easy to reach with the BTS. Don’t miss it because Octave Rooftop Lounge & Bar has not one, not two but three beautiful floors to spend the evening at with a 360 degrees view of Sukhumvit and Thonglor districts.