I have no problem with how you are doing it.
You are inviting these people to an event and it is their choice to attend or not.
( And I hope you enjoy the ribs! )
I dislike it when people come and bang on my door, be they salesmen or peopl trying to convert me.
"I dislike it when people come and bang on my door, be they salesmen or people trying to convert me."
SO DO I! The religious spammers travel in packs around my neighborhood, and I refuse to answer the door when they ring my door bell. I used to answer the door, but these folks can't take a hint when I tell them I am not interested in converting. I hated to do it, but I had to become rude and actually shut the door in their faces.
I just point at the "No Soliciting" sign", smile and close the door without speaking.