Everything we do-- what we wear, how we walk, the way we talk, sends subtle social signals, and these impact all areas of life. Two fundamental (and increasingly entwined) areas of life are sexuality (without which our race dies out) and economic (without which, each of us dies individually). These are tremendously entertwined, with over half of Americans having dated co-workers (see: http://www.forbes.com/sites/susanadams/2012/02/10/the-state-...).
So it seems to me that, particularly single, women navigating the modern workplace are trying to navigate two fundamentally conflicting desires. The first is to be professional and not be open to the problem of being offered promotions for sexual favors, or retaliation for declining such offers, and the second is to find romance, companionship, love, etc. The fact that workplace romances are so common cannot be discounted in this area.
And so you have two key questions:
1) How do you define appropriate boundaries? This is a hellishly difficult problem in the context of the workplace.
2) If boundaries aren't bright but involve a lot of give and take, then doesn't that fundamentally mean that there will be a lot of behavior that will fall outside of that which is desirable?
I honestly don't see how you solve that problem.
On the gender role issue, I am a firm believer that one is generally better off making such tasks as taking notes or arranging potlucks things which are volunteer, and then if that fails, rotated, eliminating those who can't do it reasonably well.
But beyond that........ As long as so much of our social spheres surround work, and that's where a lot of opportunity for dating (both for men and women) lies, I just don't buy that you can wish away unwanted attention.