It’s architects, not movie actors, who are the stars of Architecture Tours L.A.. In the plush comfort of a ’62 Cadillac, architectural historian Laura Massino shepherds clients to 1920s Art Deco palaces, Greene & Greene homes in Pasadena, the modernist masterpieces of Silverlake, Spanish Colonial manses in Hancock Park, and more. At $50 per person, it’s a deal.