Not necessarily, obviously, but there are spiritual atheists, and if OP asks "what are your spiritual practices" then "I have none" is a valid answer.
>It is clear that atheism and consumerism in modern society do not make people happy.
The least happy people I know are religious, and almost all the Atheists I know are pretty happy with their lives. I don't think Atheism makes people happy, but I don't think Theism makes everyone happy too. It works for some, and doesn't work for others.