In addition to Chuck and Lency Spezzano the Joie de Vivre vendors also include Osho and Philip Young (aka Philip Kansa aka "Spirit Bear") among their mentors.
http://www.tantra-yoga-dina.de/ueber-uns/index.html
[Update July 6, 2018: Dead link. Substitute link follows]
https://web.archive.org/web/20171215145142/http://www.tantra-yoga-dina.de/ueber-uns/index.html
