(I love the goonies)
EcoGeoFemme had a post a few days ago discussing (among other things) the issue of how to address a group of women or a mixed group of people.
It made me think... how do I refer to a group of women in a professional setting? I tend to use "ladies" if it's a group of women and "folks" for a mixed group or for an indeterminate mass of people. If I'm trying to get the attention of a boisterous group, I tend to bang on a table/nearby flat surface and yell... what do I yell? I think, "hey, everybody!", but I also tend to point at the person who is being the loudest/who is talking and ignoring me and call them out by name.
If I'm with a group of friends, I'll use "guys" to address them, even if it's an entirely female group. When I was visited England in high school and yelled, "hey guys" to get the attention of a bunch of female friends, I was flummoxed when I was scolded by someone who told me that we were young ladies. To me, "guys" is the casual way to address any group of people, and I have to consciously choose another term. "Ladies" sounds so formal to my ears.
I do tend to say "girls" when I refer to a group of young women or immature women, but I also refer to especially young/immature/poorly behaved men as "boys". I think I am a rarity in this, though.