First of all, The Union Hotel is not a Hotel, heck, it's not even a restaurant: it's an Experience. While the Gonnella family still runs a motel with basic accomodations behind it, the focus now is on food, and lots of it.
This place typifies Family Style Dining. Big portions of traditional hearty Italian fare, cooked by authentic Italian immigrants whose family settled here in 1879. No new-age squid ink risotto or sun-dried tomato linguine here. You'll be ordering spaghetti with meatballs, fettucine alfredo, or chicken cacciatore. And forget ordering a la carte; with each entree you will be served antipasto AND minestrone soup AND green salad AND lots of sourdough-why-aren't-you-eating-more-is-everything-okay-good-then-have-another-bite! All this for under $20/person (Pepto Bismol not included.) They also serve great pizzas and they have a dessert list. However, I cannot imagine anyone who would have room for their cheesecake after having eaten a Union Hotel dinner.