NOPE!! NOPE!!! You are hosting a gathering, not a bible study. Entertain your guests, not challenge them. If the topic does arise, say something positive.
"Recently I have come to know Jesus as my personal Saviour". (or something similar) Then move on. IMO a positive spin works better and will not cause friction. Friction will kill the atmosphere and the dinner. I do not believe anyone who makes an effort will deliberately cause a stink. Good luck with it.