Nothing planned right now, but my local independent run-by-hippies theatre lets you rent the place for private showings (i.e. closed venue, no advertising, no concessions): $50+an hourly rate, which doesn't sound bad at all. They can show Blu-rays, so that's how I'll handle the media. Not sure how big their screen is, but it's an older theatre and therefore bigger than a modern multiplex. Also not sure how many real channels their audio supports, depending on what I discover I'd go with 5.1 or 2.0. They have a ton of seating but I bet I can fill it.
It's all very preliminary, I'm in no rush. I might not get around to it until Spring. Maybe May the 4th...