There was little publicity for Seattle's first medical marijuana farmers market, but word of mouth alone packed the hall as hundreds of people lined up to go in. Under the current law, certain health care providers like doctors or nurse practitioners can issue recommendations for medical marijuana for a variety of ailments including cancer, HIV and anorexia. But unlike in California or Colorado where medical marijuana initiatives led to dispensaries that provide the drug, in Washington the medical marijuana community has remained, for the most part, underground.