If you have a Black label on the rocks at The Fog City Diner in San Francisco, double check your bill at the end of the evening.
Black Label $7.50
Apparently it's a mistake that dates back to when rocks actually meant a larger measure of liquor. Apparently, and thankfully, it shouldn't be showing up on your bill there today. If it does, maybe you should have a quiet word with the waiter. The staff were extremely gracious and apologetic. Rock Bottom