And average of 2 guests seems a bit too much. Most guys have only one GF/wife.
So maybe 1 guest per old hat...

So maybe 1 guest per old hat...
I'd be interested to know who'd be willing to join the Wall Observer in their life at such a do. Many would be creeped out by the idea.
As for me I don't know anybody any more. I would be bringing my 60-70 emotional support eels.