Try to make an a capella version of some punk songs.
Dead Kennedys- Let's lynch the land lord:
"But we can. You know we can. But we can. You know we can. Let's lynch the landlord, man."
Dropkick Murphy's- Boys on the dock:
"Say Hey johnny boy, the battle call. United we stand divide we fall. Together we are what we can't be alone. We came to this country and made it our home."
It's always fun to go "Say Hey"