Bangkok after dark

Bangkok's adult scene is smaller than its legend and more compartmentalised than visitors expect — a handful of well-known pockets inside a megacity that mostly ignores them. The honest map:

The famous pockets

• The lower-Sukhumvit sois: the modern centre of gravity — a short stretch of side-streets whose names every guidebook knows, mixing beer-bar complexes, go-gos and late venues with ordinary hotels and restaurants. Loud, dense, tourist-facing;
• Patpong (Silom): the historic name — Vietnam-era vintage, now as much night-market as nightlife, its bars sharing the sois with souvenir stalls. Go for the history and the market; mind the upstairs-show scam that has run here for decades (details);
• The Thai-facing scenes (Ratchada, RCA and beyond): hostess venues, karaoke and clubs serving domestic and regional customers — a parallel economy tourists rarely see and aren't really invited into;
• Everything else is just nightlife: most of Bangkok's world-class nights — rooftops, clubs, live music, Chinatown's bar renaissance — have nothing to do with this site's subject. The city is very good at both.

District craft

• The pockets are walkable and heavily policed by their own economics — ordinary city awareness suffices;
• Drink pricing in staged venues runs on its own logic (money page) — know it before sitting down;
• Cameras: the districts photograph badly and the people in them are at work — shoot the neon streetscape if you must, never individuals (etiquette);
• Getting home: BTS/MRT close around midnight; after that it's apps and meters — insist on meters, or walk to a main road for honest flags.