The LinuxChix regional chapters exist in several places around the world. These chapters have been formed to give women who use or are interested in learning about Linux a way to meet other women with similar interests. These chapters are loosely organized, informal, and they don't require (or imply) any form of membership or fees. Mostly it's just women hanging out with women, talking tech over coffee (and/or cheesecake :). You can find the list of chapters at Chapters.