If you’re dating, it’s a thing you hear a lot: A good way to meet someone is to take a class or join a social activity. Like playing on a co-ed volleyball team. Taking a sourdough bread-making class. Signing up for pottery. But does it work? In Episode 9, Meredith Goldstein looks at whether activities, classes, and clubs can lead you to love. Plus, something good happens to Erin. Email us at loveletters@boston.com.