Pulled into a McD's drivethru for a coffe:-
"white coffee please"
"sorry weve no white coffee, but I can do you a black with milk"
"EH?" [/quote]
That would be because they are busy, the milk in the coffee machine has just been refilled and dropped below the safe dispensing temperature for heated milk.
So to get around this they use their brains and offer black coffee with cold milk.
How do i know this?
I am a service tech for the company who supply all the above mentioned companies and a lot more with there espresso equipment.
Working in various coffee outlets fixing makes you realise just how rude some customers are, if the machine is broken why swear at the person who can't give you your coffee? it's not their fault!