I went to Starbucks yesterday in NYC for some ice water and here is my exchange with the barista.
Me: Hi, may I please have a Venti ice water?
Her: We can't give you an ice water
Me: I'll gladly pay for it
Her: I can't sell it to you
Me: I'll Pay full price for the cheapest Venti drink. Latte, mocha, whatever. and you can just put ice and water in the cup
Her: Sir, I can't sell you an ice water even if you pay for a different drink
Me: Ok, I'll get a Venti Iced Americano without the espresso shots
Her: uuuumm (puzzled look on her face) ok
I got my ice water
Lesson: If you are resourceful and persistent enough, you will ALWAYS succeed. R+P=S