I know all forms and levels of music systems convey enjoyment. How much, the level of and intensity are debatable subject matters. I don't do background music. I devote rapt attention time to my listening sessions and silence the house background noise in preparation. I mentioned extreme, somewhat, but have associated with individuals who go well beyond my efforts. There seems to be a trend or effort in various comments herein to associate genre with sound/recording quality. That may casually be accurate or generally but there are plenty of examples otherwise. I'm primarily a jazz lover, all types and eras, but I listen to everything from Hip-hop, Metal, Hard Rock, Classic Rock, Folk, World, Reggae, Indie, New Age,I have listened to Ska and Rockabilly (like the OP mentioned) in the car, on a tradesman type of 12/18v blue tooth speaker and on a proper stereo.
All give enjoyment.
However I was referring to the C-cells for the toys that the females predominantly are reported to use.
Rockabilly, Progressive Rock, and have had an extensive Classical exposure, Chamber and Symphonic. Good and bad recording production for any of it and have seen all of that live many hundreds of times. 10th. row, center for 25 years, Cleveland Orchestra. My answer and advice to the OP would still be that if you can possibly afford even a very modest system, I consider it a very worthwhile investment. IMHO!
Very few of those female entertainment devices require ' C ' cells so I would have never gotten there. I had to make a couple calls to get first hand info for that one! Lol