Discobus is a regular public transport bus. It doesn't go directly to clubs, but it stops on bus stops that are close to clubs.
The bus stop near to Pacha is named Pacha.
The bus stop near to Amnesia is named Can Joan Jaume (Amnesia).
The bus stop near to UNVRS is named Ca na Simona (UNVRS). Before, its name was Privilege.
Just try to search for buses that serve these bus stops.
Alsa Ibiza