A fast counter for the morning queue: the menu as coloured buttons, the milk and the extra shot asked for as each drink is added, and tables when you want them.
Categories across the top and every product as a coloured button with its name and price, one tap to the order.
Which milk, an extra shot, syrup: asked as the drink is added, priced as you set, printed on the ticket for whoever makes it.
A drink and a pastry at a price of their own, worked out by the till.
A screen facing the customer shows the order as it is rung up and asks for a tip before they pay.
Points earned on what they buy and spent as money off, found by their phone number.
Switch on the floor plan for the tables inside, and keep the counter fast for takeaway.