I can tell you that any big event like this, it will be a private, ticketed event. They’ll have a bar and screen set up outside, but indoors will be wrist band only. Despite that, they’re very friendly and the neighborhood likes them a lot. I’ve never seen or heard of any serious issues there, but they’ve been known to hire private security. If they anticipate big crowds (there will be like 200-300 people there) they’ll have porta-potties set up outside. Even if you can’t get a wrist band, you can probably just BYO and blend in with the crowd. I’m sure someone will invite you inside eventually.