Who says trick-or-treating is just for kids? In this game, place miniature drink bottles filled with different concoctions on trays or in bowls around your venue. Guests can then freely pick up any of the drinks to enjoy, but they won't know whether the drink is a trick or treat until after their first sip. The "treat" bottles can be some sort of alcoholic beverage, while the "trick" ones will simply be juice or water. You can also play this game with jello shots, too!
How to do it while social distancing: For a virtual party, send out fun fall drink recipes to all those who want to participate in this game, and tell everyone to make their favorite concoctions. Once those are made, tell them to get out juice or water that's a similar color to the drinks they just whipped up. Have your "guests" pour the cocktails and nonalcoholic beverages into multiple shot glasses and mix them up so they don't know which is which. They can pick their poison throughout the night, and if you're all on a video call, people can vote whether they think the shot will be a trick or a treat.