Nudists were some of the first volleyball players!
Volleyball game was in invented in 1895 by William G. Morgan, an instructor at the YMCA in Holyoke, Massachussetts, USA. By the 1920's, nudists were playing it regularly, making them some of the earliest adopters of volleyball.
In some ways, the game was ideal for early naturist clubs. Most clubs were small and a volleyball court doesn't require much space. Yet despite the relatively small court, many people can play at the same time.
The game also allows for differing levels of athleticism which makes it inclusive. The equipment required is very affordable. Finally, since there is no need for a team uniform or protective equipment, volleyball is perfect for people who like to be nude.