There is the Mädchenabend in Berlin for Bitcoin-ladies only.

If you are curious about Bitcoin or already in love with it > and if you are a woman, you're in the right place! Since May 2014 we meet once a month in Berlin to chat about Bitcoin, share our knowledge, connect and -most important- have a lot of fun together! ---Girls and Women only!--- The goal of this meetup is not to entirely separate us from the male community, but to once in a while gather in a smaller, more pinpointed group and provide a space for exchanging our ideas and Q&A in a relaxed atmosphere.

'Every woman using and teaching #bitcoin becomes a full node that forms a World Decentralized Women Bitcoin Network. Steadily we grow.' (@TrueBitcoinGirl)

To all our male supporters: Thank you in advance for acting as our ambassadors, spreading the word and inviting more women!