Tucked behind the courtyard of Mason in Canggu, The Back Room is a low-lit cocktail bar built for late nights and intentional drinking. The space trades beach-club brightness for warm shadows, close quarters, and a sound system tuned to mid-tempo house and disco. Resident DJs anchor the room without overpowering conversation, making it as suited to a two-person catch-up as a longer evening out. The cocktail menu is thoughtfully constructed. Casual dress, mid-range pricing, an…