The Prohibition-themed cocktail bar on the 24th and 25th floors of Hotel Muse Bangkok, with a roof terrace, a cigar room and a Sazerac on the menu.
The Speakeasy occupies the 24th and 25th floors of Hotel Muse Bangkok Langsuan, an MGallery property on the quiet Langsuan strip running south from Phloen Chit toward Lumpini Park. The 24th floor is the lounge — dark wood, leather banquettes, a long bar — designed as a 1920s Prohibition-era American room. The 25th floor is the open-air terrace, with cocktail tables, a small bar and skyline views over Pathumwan. The bar's own page on the Hotel Muse site confirms the 17:00–01:00 schedule and the terrace hours (closing at 23:00).
The right visitor wants a Sazerac, a Vieux Carre, or a vintage spirits flight in the lounge before heading up to the terrace for the second round. The wrong visitor wants a high-energy nightclub — the room is intentionally conversational — or a modern molecular cocktail programme, since the menu is firmly pre-Prohibition American canon, not contemporary experimentation.
The 24th-floor lounge is the headline room — dark wood panelling, brass fittings, leather banquettes, a long polished bar and a small cigar room off the south corner. The 25th-floor terrace is a more relaxed open-air deck with high-top tables and a smaller satellite bar. BK Magazine's review describes the lounge as "the most committed period-detail bar in Bangkok" — the right read; the design does not break the 1920s frame anywhere. Time Out Bangkok's speakeasy round-up flags the terrace as "the under-known second act".
The Sazerac (420 THB) is the recurring photo-review order across the top 30 Google Maps reviews, with the Vieux Carre (450 THB) and the Boulevardier (430 THB) as the regular alternates. The bar also runs a vintage spirits flight (980 THB) of three pours from the back bar — the most-cited "upgrade order" in r/Bangkok's monthly cocktail thread.
Skip the contemporary cocktails on the back of the menu — the bar has limited inventiveness there, and the programme is built around the classics. Champagne by the glass at 590 THB, wine pours competent but not the reason to come. The cigar room (from 1,200 THB) is the other upgrade if you are committing to a full night.
Through 20:00 the lounge reads as date-night couples and small groups doing a serious-cocktail booking, plus a steady tail of Hotel Muse in-house guests. From 21:00 the terrace fills with a slightly younger, dressed-up local crowd doing pre-dinner drinks before walking down Langsuan to the restaurant strip. The cigar room runs as a regulars-only quiet corner most weeknights, with a steady tail of expat and Thai businessmen on Friday and Saturday. Time Out Bangkok's nightlife guide notes the venue as "the right speakeasy to bring a date who has never been to a speakeasy".