The Westin Grande Sukhumvit, Bangkok is a 5-star hotel located in the heart of Bangkok's Sukhumvit district. The hotel features a discotheque called 'Zeta Bar' which is open every night from 9pm to 2am. Zeta Bar is a popular spot for locals and tourists alike, with a lively atmosphere and great music. The hotel also has a rooftop pool, fitness center, and several dining options.