I agree w/ Fighting Dwarf in that "women only" type classes should be introductory only.
In the kwoon (school) I train at, they offer a Women's Self Defense camp (2 day event offered to busy individuals), geared for women and possible scenarios. There are males participating, but only as "dummies" who wear protection and let the women pratice their techniques and beat on the men. It's basically a crash course in basic self-defenese for the most common scenarios. The women are faced w/ preforming technique on male agressors doing a specific set of drills. Later on, if the women want to continue to learn and expand their MA/self-defense, then they can join the regular Wing Chun Do classes offered (and that's Co-ed).
I think it's a good opportunity for people to get accostomed to a MA in their own way. I'm in no way generalizing women, but in my experiences - I found that some women are put off by training w/ men. Whether they think that the men will show off and be overbearing or that they will made fun of, I'm not sure. However, giving a person a choice to start learning in an enviroment that he/she is comfortable with is a paramount inclusion. So I think that schools should have an intro course for women to get accostomed to techniques (such as punching, hitting, dodging, kicking, follow-ups, combos, etc.) and then mix them into regular adult co-ed classes where they'll learn how to deal w/ different body types.
[This message has been edited by Emuc64 (edited 11-07-2003).]