How to swing those obbligatos around

Lyrics

He had shag hair & a boutique In the bar he told me I had too much class To be a telephone operator & I told him He should have been thirty in 1940: A gangster with patent leather shoes To shine under girl's skirts & a mother Who called him sonny. He should have Crashed a club where they catered To the smart set, disposing of The bouncer with You spent three months In a plaster cast the last time You tangled with me & I should have been The singer in tight champagne Skin waiting for him to growl I don't know how to begin This beguine but you certainly know how to Swing those obbligatos around & we Would fox-trot till a guy He knew from Sing Sing cut in & he said he loved old flicks I should come up to his place & see The art deco ashtrays on his shag rug That I shouldn't waste myself At Bell tel but marry him & take his business calls & I said How many years do you get If they give you life