Often during our blues dance lessons, I will ask the class, "What kind of blues music do you want me to play - fast or slow?" The response in almost all cases is "slow."
Since the genre of blues music is mostly about the joys and suffering in life and relationships, I tend to think that the body's interpretive response is slow, careful, and mood-driven.
For the newer blues dancer, the lead and follow body positions of connection and intimacy with a partner can be a bit intimidating and somewhat frightening, while the experienced blues dancer quite comfortably finds it easy to connect with their partner on the dance floor and simply begins to dance.
Grace and I teach a simple blues dance method of first finding your rhythm to the music, connecting with your partner, transferring the rhythmic energy to your feet, finding your combined rhythm, and then letting it go together (fast or slow tempo) on the dance floor.
With continuous exposure to all forms of music; your body's natural inclination to move; and with a little practice (or a series of blues dance lessons), dancing to slow music will easily make progress in a very short time.
Here's some more information that we found online that describes ways to slow dance to blues music.
And here are Billboard's top blues music albums for 2017 in case you're looking for some more blues music.