It's akin to a musician/artist performing/producing at some minor venue (park, museum, bar, etc just sitting in the side providing ambiance) where just a few mi

It's akin to a musician/artist performing/producing at some minor venue (park, museum, bar, etc just sitting in the side providing ambiance) where just a few minutes experience is enough for some to buy a CD/DVD/book. Give a wandering shopper a reason to drop into the gallery/store and have a remarkable few minutes, and some will buy without planning to.