Here was the playlist that my friend, Dwiz of the Knight at the Opera blog, put together when he ran the playtests for Barkeep! 

He described it as "a combination of some classic drinking songs, sea shanties, and the most hype dumbassery that are guaranteed to get a crowd singing along. A lot of one hit wonders and annoying pop jams, the kind of thing that's perfect for karaoke"

https://open.spotify.com/playlist/7Jr8zCwtHBZUaZp5DdNg7L?si=4XJdjHbpR7GSjGVAU5JZcQ&pi=u-xNEncvx2Q02w