Mike Nes is wailing "The House Of The Rising Sun", with Peter Torken on keyboard, Josh Huskwolf on drums, and Max Lennon and Paul McGear on guitar. Mike and Peter are from The Prairee Chikens (aka. "The Prairees", a Monkees tribute band). Paul, Josh and Max are from The Fab Gears (a Beatles tribute band). On occassion they get together and do full concerts with their own respective tribute songs, and sometimes their favorite songs from other bands, too.
Listen: https://www.youtube.com/watch?v=MgTSfJEf_jM
"There is a house in New Orleans
They call the Rising Sun
And it's been the ruin of many a poor boy
And God I know I'm one
My mother was a tailor
She sewed my new bluejeans
My father was a gamblin' man
Down in New Orleans
Now the only thing a gambler needs
Is a suitcase and trunk
And the only time he's satisfied
Is when he's on a drunk"