This happened to me a couple times in graduate school... When it was party of graduate students I had never met, it was like a pretty standard gig and quite fun. When it was my classmates, I had "the other DJ" throw shade on my set and dance moves, while my classmates made random requests all night.
I can see how doing it for a work party would be the same issue, plus my coworkers in the past have had a tendency to like Dave Matthews Band. So that would have been a problem