Interest in spirituality has been booming in recent years while interest in religion plummets, especially among millennials. More than half of young adults in the US believe astrology is a science. The psychic services industry—which includes astrology, aura reading, mediumship, tarot-card reading and palmistry, among other metaphysical services—is now worth $2 billion annually, according to industry analysis firm IBIS World.

Melissa Jayne, owner of Brooklyn-based "metaphysical boutique," said she has seen a major uptick in interest in the occult, especially among New Yorkers in their 20s. The store offers workshops like "Witchcraft 101," "Astrology 101," and a "Spirit SÉance." "Whether it be spell-casting, tarot, astrology, meditation and trance, or herbalism, these traditions offer tangible ways for people to enact change in their lives," she said. "For a generation that grew up in a world of big industry, environmental destruction, large and oppressive governments, and toxic social structures, all of which seem too big to change, this can be incredibly attractive."