Grooviest. Cult. Ever!
Do you want a 'real' experience to talk about when you get home from your vacation? Come and get yourself Activationized. This intriguing invitation, LIFE magazine informed readers in August 1948, was distributed that summer around Cape Cod's Provincetown to signal the beginning of a brand-new "cult" -- something known as Activationism. Here, LIFE.com offers a eulogy for and celebration of the short-lived, playful, and (evidently) quite exhilarating phenomenon.
Martha Holmes/ TIME&LIFE Pictures