Monikers

Three rounds, one deck of names. First you can say anything to get your team to guess the card, then only a single word, then you have to act it out in silence. By the last round everyone has seen every card, so a half-remembered gesture or a one-word clue from earlier becomes a running joke that only this group gets. Four is the minimum, and it gets better the more people you add. It runs longer than most picks here, often close to an hour, so save it for when the evening has settled in rather than as an opener.