Could have one attendant supervising 2-3 vending machines in a busy venue. In supermarkets in Australia, one attendant supervises 6-8 automated checkouts and it

Could have one attendant supervising 2-3 vending machines in a busy venue. In supermarkets in Australia, one attendant supervises 6-8 automated checkouts and it works well. If not vending machines, at least separate the expensive cocktail mixing from the beer and wine orders. It's painful waiting to order a round of bottled beers when the person just in front of you wants 5 random cocktails. There are bars in Europe where each table has its own beer tap in the middle, and you are charged by volume poured. Nice gimmick.