I have no idea what these stores were called, but for a brief period of time in the mid to late 80's, I remember our local mall had this store where you could go in, choose a solid-colored t-shirt or sweatshirt off the wall, and a person there would put it on this spinning rack and puff paints would be dripped onto it while the rack spun around.  When it was done, you'd have an enormous blob of abstract art-looking puff paint on your shirt.  This was all the rage at the time, and I think some company even made a home version where you could put a card on a little spinner and drop the paint on yourself while it spun around.  Does anyone else remember this?

I made a picture like this at a local fair sometime in the seventies.  Don't recall being able to do it on a t-shirt though.