Music is an incredibly effective branding tool, but also very subjective, therefore it can be problematic for your brand if employees play their own selected playlist.
"Research shows that when employees have the opportunity to influence in-store music, sales decreased by 6%. The negative effect was most pronounced for sales of women’s clothing, which showed a decrease in sales of 11%."
(Daunfeldt, Moradi, Rudholm, Öberg)