My sim has a friend group of four. They showed up at the cafe, ordered, then one sim started cracking jokes, he is a comedy sim, and everybody was laughing. Then my sim, and two of her friends grabbed their drinks, sat at the same table. The last sim was talking to the worker, slipped because she is clumsy, then she picked up her food, sat with the rest of her friends. This was all autonomous, but all of the sims were acting like their traits and skills. One of the sims, a romantic, was flirting with her boyfriend, too.