Why do you have to wait for the bartender to approach you to give them your order? Entering your order via NFC insures no miscommunication.
Dealing with credit cards or even cash can be painful. How much do you tip? Did they lose your card? Integrated billing via Paypal avoids this.
With your order history within a click, you can order your favorities that much faster. Be recognized for your past purcahses and recieve top service.