New Delhi, March 20 -- Step into the Latin American bar Una Hacienda in Bengaluru, and the mood is buzzy as servers weave through tables with small plates and cocktails. But next to the main bar is a nondescript door that leads to a whole new space-The Bunker Room.

The eight-seater operates as a place for quiet immersion. From Tuesday to Thursday and on Sunday evenings, guests can book a three- or five-flight cocktail omakase experience for a minimum of four guests. There is no menu, but over an hour or two, the space becomes a stage for the bartender's craft. The focus is squarely on the drinks.

The idea of two distinct cocktail approaches in the same venue is becoming increasingly visible across India's bar landscape. ZLB23 at The Lee...