In DC, playing on the platforms isn't allowed. So playing at the top of an elevator is pretty standard.

I'm sometimes in more of a rush when going home, because I'm afraid of just missing a train. When I'm walking out, the length of time to get to the office is pretty constant and my work is willing to let me get in late so long as I'm willing to stay late.

However, I'm probably irrational for being in such a hurry at night. But, on the whole, there's more buskers by my stop in the morning than in the evening. I think another part of that is that when you're leaving the station, you have to wait on the traffic lights. When you're entering there's nothing you have to wait on.