My characters just sat down and the heroine got a glass of wine. A nice crisp chardonnay. And then she slipped an ice cube into it. There was a gasp of outrage from a few people in their crowd and she felt the need to defend herself. They, after all, we sipping whiskey over ice. What's the difference?
So, what do you think? Is there a hard and fast rule about what can be served over ice and what can't?