Download the Chargrill Charlie’s app on the App or Play Store, register and enter coupon code 'REGULAR20' and you will get $20 Credit.*
I've known about this for a minute now but I figured I'd share the free food. Will likely be fixed after this post, the code is given out to regulars of the store but can be used on any account.
*You need to add CC details and verify your card ($1 charge) + verify a phone number. Other than that no strings, just go the store and pay at the counter with your phone, no in app ordering or delivery from what I can gather.
Enjoy! If they don't fix the code, just know you can create new accounts with the same CC details so long as you verify with a different number ;)