My sister, who is a florist and has been to and involved in tons of weddings, said it is bad luck for any of my wedding guests to walk down the center aisle on my wedding day. I have seen several pictures of this and want to do this, but I have two questions: 1) Is there a specific name for fabric that is tied to block the center aisle? I know it's not an aisle runner. And 2) Who typically takes this down/unties the bow?