Hello! When people dance they sometimes dance to special "routines" (the way dance is choreographed) that can also be repeated. Sometimes when we "negotiate" with people we can also call it a "routine" because we follow the same pattern in our way of arguing a point which could also be quite repetitive. So if someone says "we've done this dance before" (in this context) it means that they have conducted this "routine of negotiation or argument" before (possibly repeatedly), so they say "We've done this dance before." I hope that helps!

In this case "We have done this dance" is like "We have had this argument before" usually when people are arguing about numbers or opinions. One can also say this before an argument like..."Oh you want to argue about this again? Let's dance then."

Do dance means to dance.

In this case "We have done this dance" is like "We have had this argument before" usually when people are arguing about numbers or opinions. One can also say this before an argument like..."Oh you want to argue about this again? Let's dance then."