社区中心举办了一场欢乐的笑声派对，大家一起玩游戏讲笑话。

The community center held a fun ___laugh-in where people played games and told jokes.

课堂上老师讲了个笑话，引发了一场集体欢笑。

The teacher told a joke in class, which started a spontaneous ___laughing.