duaneiac

For the Firehouse Five +2 that was their normal stage apparel, so it wasn't really so much a costume for them, just their everyday work clothes. A costume for them would have been a suit and tie!

and the follow-up album

"Costume" would be defined as clothes not typically worn by said musician while at work or in everyday life. Thus, top hat and tails would not be a costume for Fred Astaire, but probably would be for most everybody else. Overalls would not be a costume for Art Blakey since he really wore them (at least on that Keystone Korner album cover), but most certainly would be for Wynton Marsalis. Here's a couple of examples with which to begin:

Unless he has slimmed down considerably, I would think that just walking from the dressing room to the stage might cause him to break a sweat . . .

I got this brand new CD last week from a seller on Amazon for 99 cents + shipping. It's a good disc, certainly worth that price. I see there is still one new copy for sale at 99 cents and a couple of used copies starting at 80 cents on Amazon right now.