A friend of mine and I were discussing why/whether or not it's wrong for folks who work in a restaurant to address people by gender. For example, if two people who look like women come into a restaurant, the bartender calling out, "Good evening, ladies! Sit where you like!" or two people who appear to be male sitting down at the bar and the bartender saying, "What are you drinking, gents?"
I'd like to know where the Chowhounders stand on this. good? bad? indifferent?
Edited to add, for clarification:
As opposed to not using gender at all, as it does offend some people. e.g. "Good evening, sit where you like!"