User blog comment:JDMoran/Sticker number 89/@comment-25065135-20170513165635

"When dining in, fill the customer's pie with their friend's favourite fillings instead"

so when customer1 and customer2 are dining in dining room, and customer1 is the ordering one, just fill the pie he/she orders with filling/s, which customer2 would order (which are in his/her actual order).