“Holiday parties consistently need to balance tradition and innovation—the familiar and the new,” says Josh Tierney of Great Performances. Which is why a wintry, white theme will always be in style. Brett Galley of Hollywood Pop Gallery predicts Disney’s blockbuster movie Frozen will inspire this year’s fetes. Think icy blues and a pale color palette with white furniture and metallic decor. For a magical mouthful, serve bite-size appetizers sprinkled with edible gold and silver glitter and sugar, suggests the team at New York catering company Tastings NYC.