Mary's Club is practically a landmark in Portland since its inception back in 1954, and its addition of topless dancers in 1965. Now Mary's wasn't going to qualify for my book, and this blog isn't about Portland's many "academies of dance" - of which there are many. Still, I liked the grittiness of this shot, and if you haven't been inside, well, some things just have to be experienced.
Which brings up the question: Does Portland have any successful blogs out there devoted to these unique establishments? I know there must be, but I haven't seen one (or rather I have not spent time actively looking)... some one please make a liar out of me. Seems like an easy way to make some coin in this town.

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Bathroom Graffiti
I know that this isn't quite what you're thinking of, but it's a good start. Aided, by the way, with help from the lovely Nikki Darling of Mary's.
http://www.barflymag.com/user/misanthroptimist/strip-clubs-for-the-beginner-or-perfect-gentleman.html
I would say that is a very good start. Now if there was just some we could find to make money on a site with posts like these...