Club Passim announced their Summer Concert Series, located in Cambridge the annual free, outdoor concerts will take place at Kendall Square, Danehy Park, Harvard Square, and the plaza at the Harvard Science Center. Open to everyone, Club Passim curated more than a dozen performances, featuring acts from Gabriella Simpkins, Kim Moberg, Naomi Westwater, and Jessye DeSilva with concerts running from June 7 until August 31. No tickets are required. You can find the complete lineups at passim.org.