Disco in 1976 lived around 120 BPM. ABBA put this one at 100 and refused to speed it up. That gap is the whole feel. Room between the kick and the snare for everything else to sit down in.

Two more things from the session that stuck with us: Benny took the rough backing track home and Frida started crying, before she or Agnetha had sung a single note on it. And Tretow got his huge sound by recording the backing track twice and nudging the tape speed between passes, because nobody in Stockholm was paying for five guitarists.

Full breakdown is up on the blog: https://www.soundgym.co/blog/item?id=dancing-queen-turns-fifty