(c) 2012 San Luis Obispo Model Railroad Association - All Rights Reserved The SLOMRA and the South County Historical Society held its 5th Annual Christmas Trains in the Village at the IOOF Building in the village of Arroyo Grande. There were model trains in Z, N, O and G scales. There were animated characters for kids and adults to activate with the push of a button. Even some carolers stop by to add to the Christmas cheer.