Jack Antonoff + Mike Birbiglia share 'Tip Your Waitstaff' song.

Having announced a charity initiative last week for Bleachers crew, Jack Antonoff has also teamed up with his friend/comedian Mike Birbiglia to write a song called 'Tip Your Waitstaff', in support of Birbiglia's charity initiative which aims to raise money for the staff of closed comedy clubs.

To learn more about the charity and to donate to a local comedy club, head here - where you can see all the clubs which each have individual fundraisers running.

Listen to the song below...