I have added refinery to an existing site, pointed it to /blog. I was able create my first user, everything looks like it works except for two things.
First, there are not wysiwyg editor visible, just a text area.
And when I try to show a page created I get an error when rendering my current site nav bar. It looks like the render is not seeing my routes, but I have no idea why.
Here are the pertinent details...
No WYSIWYG...
error when rendering page...
undefined local variable or method `profiles_path' for #<#<Class:0x007fc124046798>:0x000000085997c0>
Extracted source:
%li= link_to 'Profiles', profiles_path
All other pages of the existing site work with the nav just fine, it is only when trying to render a CMS generated page.

Solution to the wysiwyg problem was to install refinerycms-wymeditor
The solution to the profiles_path route issue was to prefix all of my nav and footer links with "main_app."