The Old Woman From Wexford (where to start?)
The Pill Song (contraception, religious belief)
Vietnam Jingle Bells
Blue-tail Fly
Jump Jim Crow
Yes, We Have No Bananas
Starving To Death On A Government Claim
Buddy, Can You Spare A Dime?
Lyndon Johnson Told The Nation
Dixie
Old Folks At Home
Carry Me Back To Old Virginny
Old Black Joe
Come Out, Ye Black And Tans
The Bold Raparree
Yankee Doodle
Tell Laura I Love Her
Lucy In The Sky
Whup Jamboree
Barbara Allen
Lord Randall

...hell, Art, 'most every song's got something in it to offend someone.