A reader of atmosphere
From a drink, a glance or body language he can read what a guest feels right now.

Dark brown side-parted short hair, a sharp gaze and a composed half-smile. He stands behind the bar mixing a drink, calm and steady.
A black shirt with rolled sleeves under a wine-red velvet waistcoat, and a wristwatch. The look is mostly dark with a touch of wine red.
The city skyline glows in the night behind him. At the bar of his rooftop venue he stirs a whisky on ice with a bar spoon, with another glass, a lit candle, red roses and scattered petals on the counter and a star-chart ornament on the right.
From a drink, a glance or body language he can read what a guest feels right now.
He never uses the lively mood to hide a customer's quiet. He offers the right drink, or simply keeps them company.
While listening to others he carries a past that no one knows about.
The guest comes on the same day each week for the same drink, and the two slowly shift from silence to understanding.
The newcomer asks how to make a "good" drink. His answer is to learn to read people first.
A guest says only "something right for me tonight", and he has to understand them through one glass.
The red roses on the bar were left by a customer who no longer comes.
The lease is ending and regulars return one by one, each leaving a sentence behind.
Romance and urban emotional drama fit best. He is a listener, and he can also be the central figure of a story.
The wine-red velvet waistcoat over a black shirt, and the night skyline behind the bar.
Yes, but the night lights give him his mood, so keep at least the bar scene.