Halloween drinking game ?

Every year I throw a Halloween party of 30-40 people. I used to play a simple game that doesn’t affect the flow of the party. We had a playlist playing normal songs and then when a particular Halloween song was playing, everybody had to take a shot. The song was multiple times in the playlist and would pop at random times, even 2 times back to back.

I want to find another type of game in the same style. We are in our 20s and don’t want to sit to play a game. And if a game is too hard and long, at some point people will stop playing. It can also be a game to play at the beginning to start the party. Any good idea?