My proposal would involve entering a grocery store, and finding all the products that claim to “Vegetarian,” but are really not. The players travel in a group, with one player holding a pack of post-it notes. When players find an edible product that claims to be vegetarian, but is not, the player that finds it writes the non-vegetarian ingredients of the food on a post it note and pastes it beneath the item’s shelf tag.
This would create a lot of interesting dialogue between the players, as there are numerous facets to vegetarianism, and any different forms. I think it would be interesting to see how this would work in a setting where people are constantly moving.