Hm...maybe something everyone can do here? It won't be easy to be active in those dresses. [He has no idea how the girls manage to walk in those heels.]
Someone comes up with a dance and then someone has to copy it and add something new? And then it keeps going until it's a dance everyone is doing. [he thinks it over again] That sounds kind of weird, but it's like a game I read in one of a book about party games. [Back when he was planning his birthday party for Yu.]