Untill it is pointed out how many realise that eight is an important number in dancing,. As was pointed out most music is written in an Octave comprising of 2 bars of music or 8 beats if this is Foxtrot. Once we know where the Slows and Quicks are we can count the Feather Step Reverse Turn Three Step and the Natural in eights.
Most of your Jive Steps are in eights. In some more advanced sixteen steps, which is 8 x 2 anyway.. Spanish Arms for instance.
I have a Latin tape by one of the best and everything they do in the Jive is to an eight count with him counting. As I said above eight is a very important part of anyones dancing.