I came across this organisation when I recently saw an Oxford uni debate on YouTube that Maryam Namazie spoke at.

I grew up in a nominally muslim (but not particularly religious) family and over time lost my faith and I now would call myself an atheist. I haven’t had any significant issues from family or others following this (it’s more something which just isn’t discussed!) but I would like to meet others who have gone on a similar journey if possible

Yousuf