What is proper etiquette for seances? Is it okay to pray to my own God if Lucifer is currently near by?

If the seance isn't in my own home, and I'm an invited guest, is it proper etiquette to pray to your own God or must I pray to the host's God, Lucifer. I fear my own God might get jealous, but I don't wish to upset the hostess. Thanks for your help. Any links that might help me would be great, especially ones from Martha Stewart. Thanks again.