Navigate Sukhumvit's endless sois and find where locals eat real Thai food, not tourist pad thai.
Sukhumvit is a 15km strip with hundreds of restaurants in side sois (alleys); each soi has its own vibe, price range, and specialty.
Soi 38–41: backpacker street food clusters, 30–100 THB; Soi 33–37: mix of street food and shophouses, 50–150 THB.
Soi 20–25: local workers eat here, good quality, 60–200 THB; Soi 26–31: mix of Thai and international.
Soi 11–19: trendy restaurants, cocktail bars, fusion dining, 300–800 THB.
Go to where you see Thai office workers eating (lunch time), avoid glowing signs advertising 'local favorites' to tourists.