Is atheism a belief?

[Amarok]

Would you consider an organization that has a 'prayer' religious?

Inherently no

There is no contradiction of non religious  institution having universal prayer among religious members

If your specifically referring to the scout their rules are odd . They won't accept atheists but they will accept Buddhist which according to you are religious atheists And a religious organization that worships 38 different religions .....

Also i point out the fact they allow gay and trans people confuses matters more