Just passing time

He lived a forty five minute subway ride away from me, but he would always take me home whenever I went to visit him. On one such occasion, we had to find something to pass the time with, so we played a game. We each picked a subway door, and if more people walked through the door you picked, you won. The prize? Playfully and lightly swat at the other person's arm. I can't remember who won, but it definitely helped pass the time.