Kaneki certainly doesn't look or feel comfortable with the festivities at all. Not only he's surrounded by food, but he is surrounded by people as well and Kaneki is not used to people or crowds or being surrounded. He comes to these things because as awkward and antisocial as he is, he sort of hopes to see a familiar face among the new arrivals, and these places are also great for that.

He certainly doesn't dance and he certain doesn't pretend he knows how to human, and prefers to stay away from the confusion as much as possible, ending up close to Dave. He notices the other sketching, and finally noticing what he is drawing, Kaneki comments softly "That's an interesting style."