Although several friends and me often get together to debate these ideas, there is no official group... However, I live in a small city, probably there are groups like yours in Sao Paulo or Rio...
Here, the "free thinking" is almost limited to the university, where I work.
Nice to meet you.
Welcome to Atheist Nexus where we recognise that gods are nothing but fictions that only exist inside the heads of the gullible.
Terry Meaden (archaeologist; physicist; Oxford)
founder of the busy discussion group
"ORIGINS: Universe, Life, Earth, Humankind, Religion, Evolution, Darwin..." with its 200 discussion topics. We seek to understand and explain the world’s great mysteries including how life and humans, religion and faith, and everything else began. We invite you to come and enjoy the discussions.