Regulars come in to your bar for various reasons: Their friends and colleagues go there. They enjoy the ambience. Maybe they really like you and the other bartenders behind the bar. More than likely, they have a cocktail they really enjoy every time they sit at the bar. Serving that cocktail and the others on the menu consistently is key to keeping your best patrons coming back again and again and is really quite simple. Proper measuring using a jigger is paramount to creating consistency behind the bar.