[GRO] Slumber party is a disaster

@HeddelvivenFirst I thought I had the same problems (except the lag), but indeed the party works correctly. When you try to fulfil the goals (eating, talking) only the host and the invited guests count. The confusing thing is that when you throw a slumber party for children, the parents have to invite the guests, but they don't count unless they invite themselves into one of the roles.

PS: To fulfil the dancing goal, I had to take a table radio. My wallspeaker didn't work.