Welcome aboard the RoadTrip America forum.
It sounds like the main purpose of your trip is to see the city sights and enjoy some night life. In that case, you should probably keep your routing straightforward and stick to the interstates as much as possible. I-20 to Atlanta; US-23, US-74 and US 441-to Gatlinburg; I-40 to Little Rock; I-30 to Texarkana; and US-71 back into Bossier City.
I drove the stretch from Shreveport through Alabama last summer. You can find my report
here. Maybe some of my stops might appeal to you as well. Since your trip seems to be music oriented, you might also want to consider a side trip to Tupelo, MS to see Elvis' birthplace, and by all means, while in Memphis make the pilgrimage to what many consider the nursery of Rock and Roll:
Sun Records' studio.
AZBuck