If the Christian god really exists, do you really think you can spout some magic words and summon him/her?
If the proceedings are for business or public stuff why do you need to get your religion involved at all?
Leave that stuff for your home and for church no need to force it onto others in the public arena. When you have a captive audience of a variety of beliefs and non beliefs, why force your belief on them?
Atheists can appeal to whatever they want. I think a moment of silence to acknowledge that there is no god will be good for everyone to think about. It might even open some people's eyes, especially the kids. This is a good thing.
But then again, there are so many beliefs, so many gods, how long will it take to get through an invocation for them all?
If your church group want to stand on a street corner and pray out loud, that's fine. If your family want to stand in a park and pray outloud that is fine. Even if your family are in a restaurant at their own table and want to pray that is fine too. But when you have a "captive" audience of a variety of beliefs, why do you have to put them through the tedium of standing their watching you pray to your imaginary god/s?