masquerade
A masquerade is a festive gathering of people wearing masks or other disguises, often elegant, historical, or fantastic in nature.
Writers have been dazzled by masquerade balls since the term entered English in the late 1500s, ultimately from the Italian mascherata. In Shakespeare’s Romeo and Juliet the “star-crossed lovers” meet at a masquerade. Edgar Allan Poe also uses a masquerade as a plot-propelling device in his 1842 short story “The Masque of the Red Death.”