Sukhumvit: Soi 11 and Thonglor
Sukhumvit Soi 11 is the international party strip, anchored by megaclubs like Insanity and Sugar Club, and lively bars like Above Eleven (rooftop) and The Iron Fairies. Beer runs ฿180-250, cocktails ฿300-450. The crowd mixes tourists, expats, and Thais in roughly equal measure.
Thonglor (Sukhumvit Soi 55) is where Bangkok's creative class drinks. Speakeasies like Rabbit Hole, listening bars, and craft cocktail destinations dominate. Cocktails ฿350-500. The vibe is sophisticated and the music ranges from jazz to deep house.
RCA Clubbing District
Royal City Avenue (RCA) is a strip of large dance clubs popular with young Thais. Onyx and Route 66 are the two megaclubs, with EDM, hip-hop, and Thai pop rooms. Cover charges ฿300-500 typically include one drink. RCA stays open later than most areas.
Khao San Road
Khao San is the legendary backpacker strip with cheap buckets (฿200-300), live cover bands, and an open-street party feel. Adjacent Soi Rambuttri is mellower with bar-restaurants and live music. Beer Chang ฿80-100. The crowd is overwhelmingly tourist with mostly young travelers.
Silom: Patpong and Soi 4
Silom Soi 4 is Bangkok's main LGBT nightlife strip with friendly bars, drag shows, and a welcoming atmosphere. Patpong (Soi 1 and 2) hosts the night market plus go-go bars; treat the latter with caution and watch for menu scams. Cocktails ฿250-400.
Asiatique and Riverside
Asiatique is a riverfront night market with restaurants, bars, and the Asiatique Sky Ferris wheel. The vibe is family-friendly early evening and turns more bar-oriented after 9pm. Free shuttle boat from Saphan Taksin BTS. Beer ฿150-200, cocktails ฿280-400.