We do two nights similar to a Lights Outs and our customers LOVE it. We limit the number of tickets so that we can be sure to send in smaller groups, so we sell 360 for each night and sold out both nights, with people emailing us up to and through the event trying to get tickets.
We had a couple people complain that they couldnt see anything, but we post EVERYWHERE that its complete darkness when you buy your tickets. Some people just refuse to pay attention. But overall, excellent event.