Megatripolis was an underground London club night created by Encyclopaedia Psychedelica/Evolution editor and founder of the Zippie movement Fraser Clark, and partner Sionaidh Craigen as well as a great many others. The club combined New Age ideology with Rave culture to create a vibrant, festival-like atmosphere presenting a wide variety of cross-cultural ideas and experiences. Club nights ran regularly on Thursdays from 1993 until 1996, being the focus of much of the Zippie movement. The club and its related activities also helped to popularise ideas such as cyberculture and the Internet between those years.