A bar is designed to be dark and warm, which makes it a beautiful set and a difficult studio. The sources are low, warm, pointed, and often visible in frame. Leaving them alone gives soft yellow images; overpowering them with flash gives catalogue images that no longer look like the room.
The method is simple: keep the bar light as ambience, and add a single worked source on the glass, matched to the same colour temperature. The venue stays recognisable, the drink becomes readable, and nobody in the picture looks startled by a flash.
Paris adds a space constraint. Bars here are narrow, often below street level, and the kit comes up a service staircase. The setup is planned around what two hands can carry and rig in twenty minutes, not around what would be ideal in a studio.