Hi Jonathan, wow, I wish more vocal groups would consider this important aspect of performance.  Of course the repertoire you are chosing will dictate exactly what is appropriate, but my first suggestion might be to get on youtube and search for african choirs. Movement is essential in their music, and while not everything they do will work for your presentation (like the Massai jump- haha!) it will get the ball rolling. There are also some world choir videos of high school and youth groups who do amazing, yet non-distracting movements that support the music. Having said that, be careful to NOT over do it. The point is to engage the audience, bring them in, and make them a part of the experience. I am absolutely *not* suggesting that you use Glee (on TV) as a model for obvious reasons, but most every one of their pieces include choreography and you might get some tasteful ideas. Have a dance instructor friend come to your rehearsals and make suggestions. Each one of your singers can also take turns sitting in the audience and making notes on what the group looks like. Of course, video tape yourselves at each rehearsal and spend some time evaluating the footage from the audience perspective. A little goes a long way. When we did a recent video for my song in Swahili- "YaLaLay" (only a few of us are good dancers) I watched quite a few videos and made notes on general movements we might try. There was nothing really difficult in there but some of the moves worked really well, I think. 

 

Some ideas may not be actual moves, but  simply relate to where you stand. i have seen smaller groups (of your size) actually change where they stand for each song. The movement between songs can be a bit distracting, but if you know exactly where you will go, and move with a pre-planned style, someone may be introducing the song while the singers change places. 

 

Since a smaller ensemble generally does not use a director, that frees each singer up to really use eye contact and connect with the audience. Again, watch some youtube, pick a few tried and true techniques and you will be surprised at how much more effective you will be. 

 

There are so many possibilities if you open your mind and brainstorm about it. Just remember, too much movement can be distracting. So make sure you are considering each song as its own program. Then, choosing to stand in one place for a song (ballad?) will have a lot more impact. Obviously if you are performing early music or chamber pieces- then your movements would reflect the movements of the time. Keep your choreography natural and simple expressions and you (and your audience) will have a lot of fun!

 

Hope this helped!

 

Hope this helps