We have a yearly tradition of the surrounding 4 homes getting together Halloween night and passing out candy. Somebody springs for pizza, someone makes a dessert, someone brings wings, and someone brings drinks. We have drink duty this year and I am looking for a fun and easy Halloween drink.

It can't be fussy and will be poured into plastic cups. Anyone have any fun ones they've made before?

ETA: It is also a necessity it contain alcohol or the neighbors will riot