For the most part, a lot of my students like it because it's a good distraction as well as a segway into some topics as well. I felt as it was a way to make sure there was a line of communication always there between everyone. When words failed, body language and food prevailed.
In terms of paying, I typically go to cafes so that I can buy some small items like cookies and cake for a fair price and then when it came to more food, I offered to pay, but most times the parents/students offered to buy me food if that happened.
Emma Scripps I would definitely say it can be started with various platforms currently, however, it would be hard to get a true reading on how efficient the app would be. If I had to start it tomorrow, it would probably be through the app, groupme or remind. The only thing is that neither app really links to Facebook truly - one of the main social media platforms apps.