Yes, I would say definitely caviar would be served. Also, some sort of pate de fois gras (goose liver pate). Since it is New York, there definitely would be some type of oyster dish - either raw oysters on the half shell, oysters Rockefeller or some other preparation. There would be crudites - raw vegetables with a dip. There also would be some fancy type of appetizers "en croute" - which means in a crust - perhaps meat covered in a crust and fried or baked. There would also be various types of expensive cheeses, cured meats such as expensive salami, pancetta or ham. Also, there would definitley be shrimp cocktail. This was very popular and would have been readily available in New York City. There would be some other type of fish as well, perhaps salted cod, smoked salmon, or the like. Also, I have read that sardines were popular back then, not on pizzas but on little crackers topped with a green olive. Another thing that rich people liked to eat were things "en gelee" - that means, encased in a gelatin. Soft boiled eggs "en gelee" were popular. This item is a French appetizer but things would have been imported by the rich to be served at their fancy parties. Also, truffles - which is a type of wild mushroom found in France that can only be uncovered by wild pigs. Weird, huh?
expensive foods like caviar and other appetizers that we have today that are part of american tradition