Give them discounts for using Bitcoins. Woman love discounts.
But in reality, when all the man start using bitcoins, woman will do it too. The internet was the same, the man started using it first, then the woman came too.
All over world that's the reality. Man take more risk compared to women. Not only internet or any other latest technology always women follow men. So, if we prove the real success of bitcoin, then women automatically will get attract to bitcoin to use it.