A Lifeless Ordinary

These are all Gildan brand graphic tees (typically sold blank, wholesale), in multiple sizes and colors (so seemingly not serendipitously plucked from a a thrift store!)

Unlike most other wardrobe auction extra pieces, each has been labeled as "IWTV3":

If we assume all the tees with such writing are band tees, the full list of bands across all lots (1, 2, 3, 4, 5, 6) is:

The Wax Dolls (with the False Idols)

The Electric Bitches (with Rabbit Rabbit and Man Eater*)

Red Gard (with Ezra Low** and Rowse)

Astoria

Dog's Brekfast [sic]

Narco Deco

Valentine's Day

*Man Eater

**Ezra Low

(Pics from the auction site for the tees I don't own:)

Crucially none of these bands exist, as far as I can tell! Some bands reference each other -- Ezra Low opens for Red Gard, Man Eater opens for the Electric Bitches.

Several shirts share the same design quirks, listing the openers but also the price, date, and time on the shirt. (Not a great decision for merch sales for a real life small act!)

The Wax Dolls shirts show them in Detroit September 15 and 17, which is interesting given the tour schedule on the official shirts, episode title speculation, and proximity to Halloween.

I think Ezra Low is a pun on choreographer Daniel Ezralow, perhaps best known for choreographing the Sochi Winter Olympics. The only IWTV crew/cast connection I can see is that he worked with director Julie Taymor who was coming up at Oberlin around the same time as Eric Bogosian...but I'm probably going off the rails here.

"Dog's Brekfast" is by far my favorite of the bunch. He reminds me of this iconic beast from the Star Trek TOS episode "The Enemy Within":

Anyway: I think someone in the art department had a lovely afternoon or two making up an interconnected universe of fake bands! I don't know if we'll actually see them on screen worn by extras, but they delight me nonetheless.