I'm trying to create a simulated model of a self-service restaurant, and the proposal is that, when running the model and creating people, they come in groups, serve themselves and the whole group occupies a table (and different groups sit at different tables). I don't want unknown people to sit at the same table, for a better approximation of reality. I tried to make my model with "assigning label" but I don't have enough knowledge to handle the software. Can anyone help me?