Yes; I always recommend doing a few even if you are going for a pure documentary style.

It’s best to keep group list to a minimum (I recommend no more than around 8-10, however it is up to you on the day), a large list can eat into time and creativity; and while I aim to do them as quickly and relaxed as possible, it does rely on the guest’s cooperation and you don’t want your guests to be waiting around for too long. A good tip is to have the groups straight after the ceremony and before drinks are served!