Although this dance really has nothing to do with quarks, I have noticed that the names of two of the six types of quark, “up”  and  “down”, appear frequently in the  instructions for dances while two others, “top” and “bottom”, are seen occasionally.  However the two most whimsically named quarks, “strange” and “charm”, are virtually never mentioned at all.  So the title of this dance is an attempt to rectify that omission!  Hopefully 1st couple will show each other some charm at least in bars 5-6 while bars 21-24 are probably a bit strange for everyone.