Want an opportunity to practice working on bikes? Are you an experienced mechanic who wants to donate your skills to help make sure all San Franciscans have affordable transportation? Or do you just want to get your hands a little dirty? Come on out and get greasy at our weekly Community Repair Night. We'll be fixing up bikes to get them ready to give away at future Community Bike Builds and honing our skills. Snacks and beverages will be provided.…