These regular buses connect Ibiza's nightlife hotspots from the beginning of June to the end of September for only 3 or 4€.
There are five lines that go to San Antonio, Playa d'En Bossa, or Santa Eulalia, stopping at Pacha, Amnesia, Privilege, or Ushuaia among other nightclubs. Most of the lines run between 00:00 and 06:00, every half an hour, with some starting early in the evening.