No, I just know that a few research groups have discussions on their FB group. I guess the problem is that articles are very specialised, and so the number of people you can discuss with (and that are interested in doing that!) is quite small. So probably most of the discussion happens via closed communications means (vis-a-vis chat, email, ...) Of course very high impact papers are an exception with regards to that.  To have a background idea: <a href="http:&#x2F;&#x2F;www.psmag.com&#x2F;books-and-culture&#x2F;killing-pigs-weed-maps-mostly-unread-world-academic-papers-76733" rel="nofollow">http:&#x2F;&#x2F;www.psmag.com&#x2F;books-and-culture&#x2F;killing-pigs-weed-map...</a>