Kai was already aware that there were many parties that came to Miami at this particular time, but he didn't want the girls to be disappointed and returned without having fun. Hence, he asked Michelle and the others to choose the places they wanted to visit and followed the schedule. He simply wanted to trap the other parties to make a move first and destroy them.
The next day, they went inside the car with another hotel staff that was supposed to be their driver for today. Kai was curious about where the previous hotel staff was. After all, he was very suspicious, at least, for Kai.
Kai let out a sigh of relief when he realized there was nothing wrong with the new staff this time, so he kept his calm and played with the others.