When Work Chat was first introduced I was flat out against it because it just seemed like yet another iMessage or Skype message chat system and with Evernote notes or folders added. More so, I really hated the way that became the only way to share folders -- I still pretty much dislike that.
However, what we all really need is comments on notes -- especially in Evernote for Business. I have tried Evernote for Business a few times and really feel that it needs a a note-based (not a general Work Chat) interface so that the company members of a given notebook can leave comments about individual notes. Yes there are workarounds as suggested above -- double lines and all that -- but they are hopelessly tiresome and really powerless in group situations. There needs to be an interface to comment on notes in a multiuser environment.
I currently use Azendoo for really the simple capability of taking Evernote notes and being able to comment on them, and see an activity stream of those comments. It's like my own Facebook of my own company Evernote notes on a topic. Why on earth does this have to happen with an external product like Azendoo? (No disrespect to them -- they have done a great job). But why can't this be an internal feature of Evernote. What's more is that Azendoo doesn't work offline whereas Evernote does.
Even more so I have highlighted text in so many notes. Why can't I search for only notes that contain highlights, or better yet be able to comment on those highlights themselves?
I have been with Evernote since it's founding in 2008 I continue to be committed to it's great note capturing capabilities. I have lots and lots of data in the notebooks. But now I really believe it's time to advance the note beyond the simply shared note to the actionable, commented upon, business building block note flows streams.