First of all, I would not say it's a porn blog. It's more the blog of a guy who works in porn (and who talks about his work) and who loves poker. But the blog itself is not pornographic: no nude photos, no videos, no dirty stories, etc.
Second, some people may not like the main subject of this blog (porn business) but it is a good blog with relevant links. It's not a spam blog at all.
Third, the article itself is excellent, it's an article about poker and the links are all relevant.
Fourth, since Penguin 4.0 Google has greatly diminished its paranoia of spammy links. Generally, it ignores them and does not really penalize the sites that receive them.
Conclusion: Personally, I would certainly not disavow this link.
" Money won is twice as sweet as money earned"
Eddie Felson in the movie The Color of Money