Mikkeller Bangkok, BrewSki (50th floor rooftop), and Let the Boy Die are top picks for IPAs, sours, and stouts.
Local craft beers: Mahanakhon Brewery and Devanom are worth trying.
Thai craft beer prices are higher than Chang/Singha (250–350 baht/pint vs 80–120 baht), but quality is night-and-day.