On a recent Sunday, 150 or so people filled the Garden Room at the Grand Hyatt in San Francisco. Next to a makeshift stage, a handful of men and women in lab coats fussed over some strange-looking devices — computers, maybe, or sound equipment — that had flashing lights. Another group of event organizers, in flowing white tunics and pants, greeted entrants.

Around 12:30 p.m., a blond, bearded figure stepped in front of a set consisting of a midcentury Modern chair and ottoman, a silver gong-like object and a reading lamp. The room stilled.

“I see you,” he breathed into a microphone attached to his face. “I’m here. You’re here. We’re all here. Aren’t we?”

And so began the Jejune Institute’s final chapter: a daylong event billed as “Socio-Reengineering Seminar 2011: An Afternoon of Rhythmic Synchronicity,” led by Antoine Logan.