Split Lip Rayfield poster
That's got to be an SLR poster in Ethan's apartment right by the doorway. Same picture as on the "In The Mud" album and what appear to be tour dates. (June 22 Turf Club St. Paul, MN...etc...).
I couldn't quite make out the text at the top, but it did start with an "S".
So I wonder who the SLR fan involved in the movie was