This REALLY Happened!
Friend (to waiter) : May I have a glass of ice water, please?
Waiter (perfectly straight-faced, seriously) : We don't have ice water here. But we have water with ice.
Friend (stunned) : Er...okay. I'll have it.
Me, witnessing scene : *MUAHAHAHAHAHAHAHAHA* (red-faced)
Thank goodness I wasn't drinking any (ice) water or other drinks at that time. Otherwise I would've choked.