Gig dream

I dreamed I was hired to play trombone for a concert with the New Leviathan (despite that they're a mostly reading band and I'm a mostly ear player - but I know the repertory). However it was apparently a last minute thing - I needed to wear a tailcoat, which I didn't have, and my trombone was across town and I didn't have time to go get it. So I went into a big cluttered maze-like used goods/antique/pawn shop to get a tailcoat and workable trombone. One of the workers there was leading me to where there was a tailcoat in my size when I lost him, then I woke up.