Yeah that definitely looked like an outtake from Entourage.
I was very much taken aback at the brutality of the final scene and how overcome the characters were by what took place (besides Woodrugh, I guess). The further I got from watching it, though, the more out of place it seemed and the less confidence I have that any of it will be justified. If the main characters aren't dealing with the fallout of this one scene for the rest of the season and it barely comes up from here on out, I will be both disappointed and unsurprised.
On a more positive note, I was very glad to see Lera Lynn return to the stage at the dive bar this episode, her music has been a high point of this season for me. I was familiar with her work from stumbling across an amazing cover she did of TV On The Radio's "Wolf Like Me" years ago, and despite the passing familiarity I immediately recognized her voice in the first episode.