Anyone have good music recommendations for blues, Irish folk music, salsa, or French café music?

Just looking for suggestions of good musicians or CDs from someone knowledgeable about any of these genres:

blues
Irish folk music
salsa
French café music (is there another name for this genre?)

Also, if you have any ideas about any of these, that’d be great too:
bluegrass
slap bass (upright acoustic bass)
shape note singing
Appalachian folk singing

Thanks!