Octave Rooftop Lounge & Bar

Perched on the 45th to 49th floor of the Bangkok Marriott Hotel Sukhumvit, Octave is one of Thonglor's best event venues — four full floors of indoor and open-air space wrapped around 360-degree city views. The 49th-floor top deck, with its illuminated round bar, is the standout spot for private gatherings, while the lower lounge levels offer a more intimate setting. Expect Asian tapas, a seafood bar, grill dishes, signature cocktails, and resident DJs setting the mood after sunset.