The reasons given are: "Tons of people wanted to come and we didn't want to have to say no to anyone, so we moved somewhere bigger." Fair enough. It's quite nice of them really!
If you sent your name for the guestlist a couple of weeks ago and received a confirmation email, make sure you come to the right place!! You need to be there as close to 7pm as possible and the age limit is 14+. Any queries about the free show should be mailed to email@example.com.