It's possible the restaurant was bought out by Village Inn as the interior is exactly the same with the same waitress who often argues with the Goth Kids still working there although the background doesn't match but this may just be a continuity error.
The Goth kids sit at Benny's all night drinking coffee, believing they are non-conformists. When the waitress becomes annoyed and tells them they should "get a life", the Goth Kids ridicule her for being a conformist.
Stan Marsh briefly joins the Goth Kids when Wendy Testaburger leaves him for Token Black. Kyle Broflovski visits Stan at Benny's, in an attempt to persuade him to return to his regular life. Much to his dismay, the Goth Kids reject the plea and accuse Kyle of living in a conformist Disney fairy-tale.