From California to New York, atheists are gathering in places you’d never expect to find them: Churches. But they’re not there to learn about God or become equipped to share the Gospel; They are there to worship secular humanism. In other words, themselves.

Dozens of gatherings dubbed “atheist mega-churches” by supporters and detractors are springing up around the U.S. after finding success in Great Britain earlier this year. The movement fueled by social media and spearheaded by two prominent British comedians is no joke.