Our Joann is often "empty" right before and right after a huge sale. I won't be there for Black Friday on a bet. I did that sale once a few years ago and it was insane - never again, I don't care if they're giving stuff away.
I love going in on Tuesdays after a big sale. Hardly any waits for fabric cutting or checkout, no shopping carts in the aisles to navigate around, no grouchy people yelling at poor sales clerks. Peace and quiet, yes!