Well, technically any atheist that engages in the idea that there is anything supernatural, be it mind/body daulism, or astrology, or powers in spells or blessings etc. etc. technically is going from being an atheist to someone who has the idea that the occult exists. It's sure to change their behavior, if even minutely, and that might qualify as religious practice. Technically, my dual perception of the mind/body, which, equaling animism, falls under that class. And this drastically changes the perception of reality that I have, apparently, to the perception I'd have and perhaps way of behaving on a religion forum for example were I merely a materialist.