I love the cocktail culture in the Pink Panther movie of the 1960s. It was so glamorous, so effortlessly swank -- and nobody seemed to be trying too hard. Since I can't get myself (or my friends) invited to one of those celluloid soirees, I do what I can to re-create the vibe when I entertain. I use lots of silver and glass: As many reflective surfaces as possible help set the stage. And I keep the menu limited -- there are options but not endless options. This makes it possible for me to spend time mixing with my guests rather than mixing drinks all night.
In addition to displaying the main seder plate, incorporate some of the symbolic foods of Passover into individual place settings. (Carafes of wine can double as place-card holders.) With everything in reach, guests will have what they need during the reading of the Haggadah, keeping the passing of the seder plate -- and the risk of spills at the table -- to a minimum.