This is a reasonable question to pose. Women, most of us would agree, can be put off by walking into a club/tournament to see that there are 0 other women there. Since women are not a minority in the population, this is not obviously a natural state of affairs. Now it is not possible to tell somebody's sexual orientation at a glance, so it is unlikely that people are put off by this. (I have seen homophobic behaviour at tournaments though.) Minority ethnic races of your choice, I am sure there is an issue there in some places, but I don't know if the solutions should be the same.
What is the best way to positively discriminate? Some may still come back with a straight "No. Positive discrimination is never right."
To retain youth players, who are often classed as the future, we generally pamper with them with attention. Youth Championships. Youth prizes within tournaments. Teaching for kids. etc
Veterans are given special championship tournaments too sometimes. I have never seen a section prize for Veterans though. Weaker players, arbitrarily divided into some boundary by kyu or dan level, are given such prizes.
These 3 categories are never considered to be positive discrimination, at least I have not seen an example of anyone publically classing them as such.
When it comes to women, words like discrimination, sexism can be thrown into the debate. That this happens, is not at all unreasonable, and it is worth exploring.
Women's championships are seen by organisations as sexist, and banned. (Though some still allow Girl's titles.)
Pair Go is used as a tool to do the same job, I still find Pair Go as an organisation rather pejorative, but I think the majority see it as positive.
Female training sessions seem to be somewhere in the middle of acceptability.
Which of these 3 paths do you see as the best approach to try? Do you see it being genuinely tried as well? (For instance, is Pair Go in your country simply a charade to allow participation in a luxurious international event, or is it actually actively used for promotion.)