I'm hoping you folks can help me out with this.
I once saw this awesome poster for what I think was an Explosions in the Sky concert -- it was blue, with the Western Blue Line eL station (in Chicago) screen printed on it. The concert was at the Congress Theatre, I assume, as the Western eL station is only a few blocks away from the venue. My google-fu is terrible tonight.
It might not be for EitS, but I'm pretty sure it was. I've also googled Mogwai, the Wrens and the National, even though I don't think any of them have ever played there. Does anyone have a clue what I'm thinking of? I'd love to buy a print of it.