Vern's is a dive where you'll always see interesting punk/metal/hardcore shows. Think of your stereotypical dive bar from movies, and you can get the idea. Yes this includes the bathrooms from time to time. OK... most of the time.
Be prepared for it to be really loud too, since it is a small venue. From the bar to the front of the "stage" takes about 5-10 steps. If the band is really good, you'll see some moshing up front as well, so keep that in mind when you choose where to sit or stand.
For the clientele it serves, this place is perfect. I doubt they'd have it any other way.