Can I have a coffee?
Can you get me a coffee?
I would like a coffee, please can you make me one in exchange for money?
Talking of coffee. I hate coffee shop workers who leave the milk steamer rod wiping cloth on the worksurface. I'd call them Batista's, bit surely a barista knows not to do that?
Can I get a coffe?
No you can't get it because you don't work here, someone has to get it for you.