The 61st-floor outdoor rooftop bar at Banyan Tree Bangkok, one floor below Vertigo, with cocktails on the open-air sky deck.
Moon Bar is the 61st-floor rooftop bar at Banyan Tree Bangkok on South Sathon Road, one floor below the hotel's better-known Vertigo restaurant. Where Vertigo is the dining destination, Moon Bar is the drinks-only counterpart — an open-air sky-deck with a long bar, bar stools and a sunset programme that books out most weekend nights. Travel + Leisure's Bangkok rooftop guide describes the pair as "the original Bangkok hotel-rooftop concept… the one that Sky Bar Lebua copied in 2004". The Banyan Tree official site confirms the 17:00–01:00 schedule and the 61st-floor location.
The right visitor wants a sunset Negroni 245 metres above Sathon, a long sit on the wind-exposed deck, and dinner at Vertigo the floor above as the rounded-out night. The wrong visitor wants a quiet indoor lounge — the bar is open-air and closes when storms roll in — or a Sukhumvit-strip nightlife venue, since Moon Bar runs as a cocktail terrace, not a late-night club.
The deck is a triangular open-air platform with a long bar along the south edge, bar stools and standing rails facing the Sathon skyline. Glass barriers stop the wind and the drop; the music is acoustic-jazz-leaning and intentionally kept low so the view does the work. Banyan Tree's official description calls it "a 360-degree open-air sky deck" and Time Out Bangkok's rooftop guide notes the deck is fully exposed — rain cancels service. Closure-in-storm policy is published on the bar's own page.
The signature cocktail is the Vertigo Sunset (690 THB), a passionfruit-and-rum aperitif on the rocks that has been on the menu since the bar opened in 1999 and shows up in nearly every Google Maps photo review. The Negroni and the Old Fashioned (both 690 THB) are well-executed; the seasonal menu rotates quarterly but the regulars on r/Bangkok consistently recommend the classics over the rotation.
Champagne is the second pillar — Veuve Clicquot and Moet by the glass at 690 THB, bottles from 4,900 THB. Skip the bar's small-plate snacks; the food is built for ballast, not occasion, and Vertigo upstairs is the right answer if you want a meal. Minimum spend after 20:00 is 1,000 THB per person — published on the booking page and worth knowing in advance.
From 17:30 the deck fills with reservation-holding couples doing the Bangkok sunset photo, plus a steady wave of Banyan Tree and St Regis hotel guests pulled up from the Sathon lobby. The kitchen-and-bar handover with Vertigo happens at 19:00; from 20:30 the deck thins to a quieter nightcap crowd of hotel residents and dressed-up locals. Travel + Leisure's rooftop guide flags Moon Bar as "the rooftop where Bangkok's older money still drinks" — an honest read; the average age is closer to 40 than 25.