Bay seniors whose only picture of Mexican ranchero life in California comes from “Zorro” movies might want to join the festivities this Saturday at the historic Sanchez Adobe in Pacifica. Built in 1846 as part of a 9,000-acre land grant the building is maintained by the San Mateo County History Museum which has an extensive collection at its Redwood City location. The Sanchez event runs from noon to 4 and showcases early California music and authentic ranchero food. $1 donation. More history is on display at the historic society’s 1854 general store in Woodside.