Fan costuming caught on, however, and the 2nd Worldcon (1940) had both of those an unofficial masquerade held in Douglas' home and an official masquerade as aspect of the programme. Early Worldcon masquerade balls highlighted a band, dancing, food stuff and drinks. The 15th Worldcon (1957) brought the initial formal conference masquerade to the Uk. Worldcon masquerade attendance peaked in the eighties and begun to slide thereafter.