Share scary stories
Your friends probably know some good ones, but you can come equipped with a book or some stories from the internet just in case. If enough of your friends express an interest in sharing their own scary stories, you can make it into a contest.
One of the best traditional crafts for Halloween time is making jack-o-lanterns. If you’re not sure about handing all of your seniors sharp implements, you can have a pumpkin painting day or give them sharpies to draw designs on the pumpkins.
Classic horror movie marathon
Your friends probably have some favorite old classic horror movies. Poll them to pick out a few of the most popular, and give them the option to come together and watch them on Halloween or in the days leading up to it.
Brainstorm as many different Halloween-related themes and ideas you can think of for your residents to act out. You should all have fun watching people mime Dracula or try to figure out how to act like a spider.