On last night's #MadMen, Glen asks Sally if she's bought "The Spoonful" album yet. He's talking about The Lovin' Spoonful. By August 1966, the band had reached no. 1 on the Billboard Hot 100 with their awesome-sauce song, "Summer in the City," which makes reference to the "back of my neck feeling dirty and gritty." Sally, little genius that she is, knows that Glen will get this reference when she makes her "dirty" proclamation about Manhattan.
The Lovin' Spoonful is an American rock band, inducted into the Rock and Roll Hall of Fame in 2000 and well known for a number of hit songs in the 1960s including "Summer in the City", "Do You Believe In Magic", "Did You Ever Have to Make Up Your Mind?", and "Daydream".