From sfbike.org:

San Francisco now sports over 20 parklets, hosted by a variety of businesses – from cafes and pizza parlors to bike shops and art galleries. Join us on a leisurely ride to visit a handful of your favorite parklets (there’s too many to visit all in one day). We’ll stop longer at a few for refreshments and a chat with the parklet host. Expect a two to three hour ride, longer if we’re having fun and the weather is nice. Email liza@sfgreatstreets.org to let us know you will be joining the ride!

SF Bicycle Coalition recreational rides are free for SF Bicycle Coalition members (a $5 donation from non-members is appreciated); rain cancels rides.