The annual smorgasbord of holiday entertainment has begun: “Hansel and Gretel,” “A Christmas Story,” “The Russian Nutcracker,” concerts by Irish entertainers and theater organists, … I’m only touching the surface here and only talking about this week’s fare (starting Dec. 4). Please share your impressions of these performances. And, as always, we’d love to know what you saw and did at First Friday and First Saturday.