Sentence:  Behind the counter, repairing a clogged sink and making chocolate egg creams at the same time, to <WSD>jukebox</WSD> riffs of Patti LaBelle singing "I Sold My Heart to the Junkman," was the proprietor, Rudy. 
Meaning of the word marked with <WSD> tags:  To play and listen to music from a jukebox.