Forgive the metaphor when we say good coffee house music can be a little like a good cup of coffee itself: warm, comforting, intimate, but a little bracing, too. Focusing on the poppier side of folk and singer-songwriter music, here’s a playlist of easy sounds that split the difference between smooth and percolated, gentle and engaged. Our editors update picks here regularly. If you hear something you like, add it to your library.