Like an eco-friendly Justice League, DubSea Bikes is a nonprofit collective of eight local organizations (including Bike Works, Cascade Bicycle Club, and the King County Food & Fitness Initiative) intent on spreading the velocipede love in low-income and bike-shop-less districts. Their main MO is to give free tune-ups to anyone with a two-wheeler, and today they’re doing it at the White Center Food Bank, so bring a donation (you don’t have to, but do you really want to give cyclists a worse reputation?). Sadly, DubSea can’t work miracles, so if your ride’s totally screwed, they’ll refer you to a bike shop. (White Center Food Bank, 10829 Eighth Ave SW, 860-1432, 2–4 pm, free)