Earlier, having lunch in TGI Friday, I ordered a hamburger and a diet Coke (going all native). I was surprised, having finished my Coke, and the glass removed by an attentive waiter, to find it suddenly reappear again refilled. And again. And here in Starbucks, when I ordered a coffee, they told me that they had run out, and would I like anything else. I said yes I would and said what. Only to get it free!