SAN FRANCISCO - The newest attraction planned for Fisherman's Wharf, San Francisco's most popular tourist destination, has no sign, no advertisements and not even a scrap of sourdough. Yet everyone seems to think that the new business, the Green Cross, will be a hit, drawing customers from all over the region to sample its aromatic wares.

For some, that is exactly the problem.

The Green Cross is a cannabis club, one of scores that sell marijuana to patients with a doctor's note. They have sprouted around California in the decade since the passage of Proposition 215, which legalized the use and sale of marijuana to those suffering from chronic pain, illness or infirmity. San Francisco, a hot spot in the AIDS epidemic, voted overwhelmingly in favor of the proposition in 1996 and has about 30 clubs, serving some 25,000 patients and caregivers.

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