Theme parties were all the rage in the 1950s. A Hollywood Themed Party was very popular. There were several ways a host/hostess would plan it. One was asking party-goers to dress like a famous celebrity from a specific era, a costume party, or it would be a simple get together with the house decorated like "Tinsel Town". Some even held the party around Halloween! Table settings were either stylish or all-out Hollywood.
Here's a menu of such a party: Caviar, Chicken l'orange, Green Beans Almandine, hearts of palm salad in vinaigrette, fruit, cheese, and an elaborate cake, coffee and, of course, champagne.
Charades was a popular game, especially with hit movies.