From high-profile affairs hosted by Elton John and Madonna to luxe fashion soirees presented by Chanel and Giorgio Armani, find out where A-list stars will be partying in the run-up to the Oscars.

The Smithsonian’s National Museum of the American Indian will display two gowns worn by Oscar-nominated actor Lily Gladstone (Siksikaitsitapi [Blackfeet]/Nimiipuu [Nez Perce]) at its museum in ...