I was in NYC during 9/11; it happened on a Tuesday, I was on stage Thursday. It was a small crowd, but it took about 10 days and comedy clubs were packed.
I'm not going to lie. I am a psycho. Luckily, I get most of it out on stage.
The first night you walk down to a comedy club, at least for me, I had my voice, and then I went on stage and I lost it.