Spectrum Lounge & Bar is a rooftop bar serving cocktails and beer, located on the upper floors of the Hyatt Regency Bangkok Sukhumvit in Watthana, Bangkok. The 29th floor has piano playing and live singing, while the floor above centers on a DJ and electronic music. Salted peanuts come as a basic snack with orders, and the restroom stalls have a sink inside with a toilet lid that opens automatically when the door is opened. Cocktails are on the pricier side.