Well, you'll need to put this under a cut, it's way too big.
As a Brit, we call it "cocoa" too, but the other term is "hot chocolate", "drinking chocolate" is known, but rarely used.
Mitch could well be trying to chat him up, but he needs to work on his line "Geez, you ain't done much with YOUR life" is pretty much guaranteed to NOT make we want to give your cafe business.