Mark did everything I asked of him for our staff holiday party in Boston. He did 4 hours of DJing, trivia, and karaoke.
The only thing that could have been better was the trivia. The rules and point system were not explained clearly and, in hindsight, I wish I would have had more say on the content of the trivia. Still, it was cool to have the trivia up on the TV screen for the visual questions.