I think having a card reader attached to the mto. Order menu menu for our guest to insert a completely personlized. Mysheetz. Card into it to bring up previous orders.
..food allergies(in case they order an item they can't eat by mistake....have there favorites listed...and favorite condiments listed and an option to repeat the order from there last visit...making the guest feel welcomed an individualize there exsperience. Also.
.offering rewards for trying new things and maybe have three favorite background color and music pop up..