Learning to ref with soul

What's better than working eight hours, then sitting in a classroom for four more hours?
Well, I suppose it you are learning more about something you love, you might be able to answer: Spending eight hours the following day in that same classroom.
You might.
I am not quite able to answer that way, because I am tired and a bit cranky.
I am taking a 12-hour soccer referee course provided by USSF instructors. Broken into one night and one day session, the course delves deep into the rules of my beloved association football.
Driving to and from the course, I have been listening to some soul music I purchased the past couple of days from iTunes. My vintage punk and reggae collection was probably on a par with all but the most obsessive collectors. I am hoping to bring my soul and early R&B collection as close as possible to that level.
So, I have been purchasing some SOUL ESSENTIALS to plug the gaps.
I have purchased Solomon Burke's "Cry to Me" and "Got to Get You Off My Mind," the Delfonics' "La La (Means I Love You)" and "Didn't I (Blow Your Mind This Time)" and The Stylistics' "You Make Me Feel Brand New" and "I'm Stone in Love With You."
You see the pattern? Great, timeless stuff that should be a part of everybody's collection.
It's the type of music you can hum to yourself during hour No. 9 of a soccer referee course, as you prepare for that 100-question test.