I don't see anything wrong with it and I'd think twice about going back to any restaurant who made a fuss over it. I usually just squeeze lemon into my water to flavor it -- so if I did what you want to do, I'd actually be saving the restaurant a lemon! I don't object to sodas, but the price is way out of control in some place -- I went to one restaurant over vacation that was charging 1.95 for a 12 oz glass and also charging for refills. That's pretty steep, IMO.

__________________

Reading is Fundamental.