Octave is a rooftop bar on the upper floors of a Marriott hotel in the Thong Lo area of Bangkok. It serves cocktails, wine, and beer, and visitors watch the sunset and the night view from there. It is a 5 to 10 minute walk from BTS Thong Lo station, and guests take an elevator to the 45th floor and transfer to another elevator to reach the 48th floor. The 49th floor is loud with DJing.