How do you find a common interest group to join that offers group health insurance?

It's illegal to join a group only/primarily just for health insurance. Sure there are Alumni Groups that may offer it... but the pricing reflects who in the group is actually buying it. Check out pricing in CA at www.SteveShorr.com If you want the legal citation - email me directly and I'll get it for you.

Does your employer offer coverage?

Check with any associations that you might belong to and see if they offer anything.