One day in a NY area deli:
"One coffee, black, please."
"Black, no sugar?"
"Right--black means no sugar, so, right."
Another day in a NY area deli (a different deli):
"One coffee, black, please."
"Black, no sugar?"
"Right--black, no sugar."
Another day (yet another different deli):
"One coffee, black, please."
"Milk, no sugar?"
"No--black, meaning no milk, no sugar."
"Milk?" (Deli employee starts pouring milk into coffee cup.)
"No, black means... Oh never mind."