Fix parties

[dnlsimmer]

Hey Simmers and SimGurus!

I have a suggestion for the team. We all know that the parties are broken, how about if you want to correct you to create a new system of parties in real time? (A kind of multiplayer) that would be an incredible thing, even if it took time to do. The parties would be even nicer.

This is a suggestion, but if possible at least arrange the parties.