Scotch on the rocks. Hold the rocks.

Saturday night I was out on the town with a friend and we stopped by a swanky (for me at least) club for a couple of drinks. My friend ordered a gin and tonic and I ordered a scotch. The waiter asked me how I liked my scotch and I said on the rocks. Both drinks arrived and were good if unspectacular.

Fast forward to the end of the night. Being the gentleman I am, I grab the check. My suaveness was undermined when I did a double-take at the bill. While the gin & tonics were the price that had been listed on the bar’s drink board, my drinks were a little bit more. Specifically the bill said this about each scotch:
Scotch: $6.00
w/Rocks: $0.50

Forgetting my diplomatic cool, I called over the waiter and asked in so many words why the hell I was being charged for some ice cubes.