Immediately thought of these when seeing the post. If you're in Los Angeles there is the Bikerowave [1], Bicycle Kitchen [2], and Bike Oven [3]. I'm about to donate two bikes and a ton of parts to Bikerowave this week. Really great places.

1. https://bikerowave.org

2. https://bicyclekitchen.org/

3. https://www.yelp.com/biz/bike-oven-los-angeles