Trick or Treat with the Downtown Penngrove Merchants Association. Bring your little goblins to California Brick Chicks, Contessi Ballet, Fringe, Hello Penngrove, Main Street Fitness, Penngrove Market, Penngrove Hub, The Third Key, Bright Skies Montessori, Frizelle Enos Feeds, Good Gray, Mama J’s Pizzeria, Odd Cookie, Penngrove Bank, Svelte Salon and Soap Cauldron for a sweet treat!