It was "And the Band Played Waltzing Matilda" They had tried to play along but no body knew the song. Also since I started a cappella I started in what ever key felt right. They were trying to figure out the song and the key so I finally had to ask them to stop because they were several keys and were playing wrong progressions and I got to the point I wasn't even singing the right melody. It felt like it was written by alban berg. So they stopped and I sang it a cappella. This dinner is one of my favorite things to do. There are some incredible muscians. The young dark haired girl is a member of a band called the whibberlies, all siblings. They are some of the best blue grass pickers I have ever heard.