[MCBear]

Keep a comfortable pace. No one came to watch them do cheers, they came to watch them play volleyball, so if they keep huddling after every point, first - tell them the next time it happens they will be assessed an Unnecessary Delay Time-Out. If it happens again, same thing. If it happens a third time, it will be Unnecessary Delay and they will be penalized a loss of rally/point since they no longer have any time-outs available.

The other option is, if the serving team is ready and the receiving team is delaying getting out of their little "huddle", blow the whistle and call for the serve. If the receiving team complains, simply tell them that they are delaying the game and the whistle will be blown for serve when the serving team is ready to go (unless there is a substitution or time-out taking place at the moment).