Muay Thai at Rajadamnern Stadium (a 20-minute walk from Khao San Road, nightly fights at 6:30 p.m., $40-100/seat ringside). Day two: tuk-tuk dinner crawl (the bachelor crew rides 2-3 to a tuk-tuk through Yaowarat Chinatown food stalls, $20-40/person all-in). Day three: rooftop bar marathon — Sky Bar Lebua (820 ft, the Hangover Part II location), Vertigo Banyan Tree, the Speakeasy Hotel Muse (Prohibition-themed). Sleep at the Park Hyatt Bangkok or Lub d Khao San (steps from the boxing stadium). Suvarnabhumi (BKK) or Don Mueang (DMK).
Five quick questions, then we build the full itinerary — lodging, daily schedule, dining, bars, the group-chat message — and drop you into a Trip Room you can share with the crew.