I have just got into crystal healing and meditation, and started a yahoo group- how do I get ppl to join?

Basically, none of my friends/colleagues are into to this, so I can't invite them, and I don't want to poach members from other groups. Are there so few ppl interested in this? If you want to join, the group's name is crystal_exps and you'll find it under the spirituality category. It's open to anyone using crystals for inner exploration, therapy, etc, or if you're just curious. Please help!