The Sunday Assembly's website says that it is "a godless congregation that meets on the first Sunday of every month to hear great talks, sing songs and generally celebrate the wonder of life." They say that it is a service for anyone who wants to "live better, help often and wonder more."
Atheist "church" co-founder and comedian Sanderson Jones says in the group's recent video, "It's part-foot-stomping show, part-atheist church, and 100% celebration of life."
"We've come up with a plan so that as many people as possible can start having as much fun as we're having as soon as possible," Jones says in the video. He went on to say, "We're pretty sure there are going to be loads of people who are going to want to live better until they're doing their best."
The Sunday Assembly says it will provide atheist "church" plant hopefuls with videos, marketing support, and all the resources it can, but will make sure there is creative space left for personalization. Choosing the songs, readings and speakers is up to each individual location.