I one worked in a very large club (5 f&b outlets, over 8,000 members) that had "muzak" piped in--everywhere, including employees changerooms, the kitchens, and common areas. What can I say? Two employees were fired for "defacing property" (crawling up into the ceiling and unhooking the speakers), about a dozen of us quit after about 6 mths . I have to add that there were only 3 cd's playing 24 hrs a day.
Music is a very personal thing. I can listen to classic, jazz, most mainstream stuff, but I will unplug any device (regrdless of who owns it) that plays: Bluegrass, country, gospel, heavy metal/headbanger, Abba, opera in it's three forms: European, Chinese, and 'murican (Broadway/musical).
Basically, if you're working alone, whatever you want to listen to is fine. If you're with others, the only thing everyone can agree on is no music at all--especially at service times.