This year's Spinback Spinathon gives 100% of its proceeds to Shanghai Young Bakers, who enable disadvantaged Chinese young adults to find qualified jobs and lead independent lives. Spin from 9am-9pm, with 18 bikes per hour, to themed sets and music. Cost is 200rmb per bike per hour; raffle tickets also available. To reserve a bike or ask about sponsorship opportunities, email adriana@spinbackfitness.com.