From YBike:
Join us to ride on our awesome skills course, or make training wheels a thing of the past with the help of YBike staff in our “learn to ride” area. Plus you can purchase smoothies for $1, made with our pedal-powered bike blender! Helmets and bikes will be provided to use, though you're more than welcome to bring your own.
Questions? Interested in volunteering? Contact YBike Coordinator Winston Parsons at wparsons@ymcasf.net (650) 294-2627