Half the customers didn’t know how to order on the iPad, a Google commenter wrote
Here is some insight on cash in restaurants. Shake Shack backed off of it but still is working towards cashless. The CEO reasons are:
Safety: We’ve mitigated the very real security risks associated with having large quantities of cash on-site, so we can become a safer place for our team and our guests.
Efficiency: We’ve streamlined our operations, eliminating cash-counting, and facilitating easier shift transitions (team members can jump on the register without the time-consuming security steps involved in cash-tray change-outs.)
Speed: Without handling cash and making change, we can serve more guests in far less time, meaning you spend less time waiting in line to place your order and pay.
Here is LinkedIn article from Meyer the CEO