Art Robinson finishes his contribution on slides/single jigs with the comment:
Finally, my daughter does step dancing, and they do single jigs but have
never heard of a slide.
The music for slides and single jigs is the same but the dance is different.
Single jigs are done by step dancers, e.g. Art's daughter. Slides are one of
the forms used in Set Dances, e.g. the North Kerry Set. These are not "set
dances" that step dancers do, e.g., The Blackbird or The Job of Journeywork;
these are like square dances for four couples. The North Kerry Set consists
of five forms involving polka, slide, and hornpipe music. (I don't remember
the order.) The slide/single jig music works very well because the dancers
do a sort of polka step as they progress around the square; double jig music
doesn't have the right feel.
For those of you going to Irish Week at Augusta, try to take the mini-class
in set dances. They are a lot of fun.