My favorite club in SF is HopeNet off of 9th St. It's easily the most compassionate place for patients I've been to, and it's probably my favorite dispensary in the whole Bay. CannaMed Care is cool, especially their lounge, but their meds are really expensive.

At HopeNet, they always weigh over every bag I buy (last 8th I bought came out to 4.2 grams for $50), plus they usually throw in like a free treat as well. They also allow for on-site medication. Cathy, the owner, is a really sweet lady. I always leave HopeNet with a smile on my face. =)