What is a "Philosophical Naturalist?" It is one that thinks, philosophically, that only the natural world exists. Nothing supernatural exists. Why think that? Because there's no good evidence for anything supernatural existing.
If you are a naturalist in that sort of philosophical way, and would like to meet other like-minded people, then join us at our next social event. All event details can be found here: http://tinyurl.com/l8c5c7h . We will gather at The Fireside Grill in Beaverton (this social event is only for those 21 and over).
When it comes to understanding the world, one should really look for evidence to ground their beliefs. Otherwise, a belief could very well just be a delusion. Evidence is what can indicate what is real. Here's a great quote to exemplify this idea, spoken by Isaac Asimov:
I believe in evidence. I believe in observation, measurement, and reasoning, confirmed by independent observers. I'll believe anything, no matter how wild and ridiculous, if there is evidence for it. The wilder and more ridiculous something is, however, the firmer and more solid the evidence will have to be.
The Center for Philosophical Naturalism was founded with the goal to help people to learn how to have a naturalistic worldview. As humans, we evolved biologically, as well as memetically. People should learn how to think clearly and accurately, and that takes training, just like any other discipline.
For those of a nonreligious mindset, here's some other groups on meetup.com that you might find interesting:
-- Westside Science & Religion Disc.: http://tinyurl.com/bkmhdl5
-- Sunday Assembly: http://tinyurl.com/kkc8nyw
-- Center for Inquiry: http://tinyurl.com/mps923r
-- Humanists of Greater Portland: http://tinyurl.com/kmbmt57
-- Atheists Etcetera: http://tinyurl.com/nhjr3ha
-- Philosophy Workshop: http://tinyurl.com/pzs4ajc
-- The Center for Philosophical Naturalism: http://tinyurl.com/l6rd4sl