legal split and now we have to divide the LS social circle

so the lawyers are sorting the house and the pensions and the cars but no one tells you about dividing the friend group. we've got 6 couples we're both close with from the scene. some are clearly "her" friends originally, some are clearly mine, the rest are genuinely both. has anyone done this divvy up without it being awful... we're trying to be civilised, we've got a spreadsheet (yes really, sad i know) of who hosts who when. but every couple we tell about the split is asking "well are we still ok to invite you BOTH" and i don't know what to say. how do you decide who "gets" which couples after a divorce... aussies especially given how small our scene is over here