If I am drinking in a restaurant or bar, always without ice, as I used to live in Singapore and traveling round the area ice water was widely thought to be dirty and unsafe to drink.... I'm in Europe now, have been for a long time, but can't shake the ick factor for ice!
At home, if it's really really hot then I put ice in my drinks. Mostly I keep ice in the freezer for my husband's occasional G&T.