Soul Brothers and Sister Lou, the
I'm having a hard time writing this review because I love the book so much. I've read it a bunch of times (five? ten?) since I first encountered it as a child. It's about a 14-year-old African-American girl coming up in a poor neighborhood of an unnamed northern city. She wants to feel like part of something, and gets her chance when she wrangles a former storefront church with an old piano in it into a clubhouse for her and the kids who previously had to hang out on the street, dodging a vindictive cop named Lafferty.