A bar or restaurant owner should look for a photographer who has firstly some bar and cocktail work in there portfolio and instagram that you like, and secondly has some knowledge or maybe worked in the bar industry at some point. Finally as most bars are only open from later in the afternoon to late (most bars are dark and moody) your photographers photos of your bar and drinks should look like there shoot in time period.
How do you get the word out? How do you let the people know what to expect?
You’ll want to get your bar into the media and the best way of doing this to have some photos of your bar, ready to go. They give editors and writers and the public at large a first impression of your bar.