Dont bother
One hour of rude old people + couple of minutes of ridiculous halloween costume that looks pathetic. Sounds good? Who the hell agreed on this costume? I bet you could make a scary one for $2000.
Dont get me wrong, idea was quite good but execution sucked. I recently watched The Pyramid (rating around 5) which was waaay better but still sucked. (monster was CGI, still bad)
If you want to create good oldschool style movie, look at recently released The Guest.
Oh, and if you want to see Werewolf thats gonna scare you- watch Dog Soldiers. That movie was simple (6/10 for me) but compared to this it was a masterpiece.
Im still waiting for good Werewolf movie- is there a curse or something?