Originally Posted by Mrs F:
“that's what I'm assuming is the reason it's not done over here.

I dont know how far you could get rehearsing something individually which is later put in a group”

Apparently - according to a US friend of mine who works backstage on DWTS - all the couples have to spend a few hours during one day together learning the section of the routine that they all dance together. They then go away and put their individual section of the routine together themselves; they then rehearse together again on the day of the show.