The Galactic Costume Extravaganza was an annual event sponsored by Elwis Bontraar in the last years of the Galactic Republic. Attendance ranged from by business leaders to military personnel, and other wealthy beings, all of whom were required to wear an unusual costume and spend an entire day and night sharing all manner of information.

This open-invitation event was held aboard the Bontraar's immense yacht, the Masquerade, where any being could attend and exchange information without ever revealing their true identity.