From my experience with them:
They usually know almost everyone (and like to be in good terms with everyone:they kinda think of it as a good investment:you never know when you might need someone
).
They can appear to like people that they don't: the number of times an enfj told me that a person I thought they liked a lot is an idiot haha
They claim they can tell what someone is like based on appearance and maybe by exchanging a sentence or two. (they're usually not wrong either)
They're among the most eloquent people.
If an enfj tells you about a movie they liked and then you see the movie: the movie is never gonna live up to their description (you gonna enjoy more listening to them describe the movie than actually watching it), seriously they should make trailers narrated by enfjs!
They're often into some dark imagery, even when they're not, they have refined sense of aesthetics.
If the enfj is a guy they're most likely to have a group of female friends who talk to them about everything.