There's a much simpler solution that solves 80% of the chaos at bars as well. If the bar ever gets crowded enough that you need at least two bartenders, put a s

There's a much simpler solution that solves 80% of the chaos at bars as well. If the bar ever gets crowded enough that you need at least two bartenders, put a sign that says "order here" at one end and "pick up here" at the other. Basically, make bars operate more like Starbucks.