Many will incorrectly answer "no" to this question, not realizing their system of values and beliefs and rituals has every hallmark of religion except the belief in a supernatural god.
I found a list of hallmarks of religion: Belief System, Sacred Texts, Rituals, Moral Code, Worship, Community, Spiritual Experience, Institutions, Mythology, Symbols, Afterlife Beliefs, Sacredness, Prophecy.
A system of morals has nothing to do with religion, no matter how much the religious folk like to claim that they are inextricably linked. So no, absence of belief is not religion-lite.
You're the one not realizing, it's that final belief that makes it a religion, that other shit you mention isn't religion, it's just world view and lifestyle neither of which are traits unique to religion. "How to live life" is not religion.