Where do Mary Ann, Mona, Michael, Brian, and Mrs. Madrigal live in the novel, Tales of the City?

Mary Ann, Mona, Michael, Brian, and Mrs. Madrigal all live at 28 Barbary Lane, a rambling old house, that is broken up into several apartments.The building is described by the characters as an oasis of compassion, safety and friendship in the desert of the harsh real world.