My father in law will buy reduced expiring meat/other fresh produce, and serve it to guests a few days after use by date. Think things like expired pâté, expired salmon from the fish counter, expired desserts with fresh cream, expired chicken. Anything from 2-5 days expired if it makes a difference.
He grew up in Africa, and obviously now has a cast iron stomach! Perhaps should add he is now very rich (buying reduced food must be how he managed it!) He will also leave soft unpasteurized cheeses on the radiator for days before eating them 
I have emetophobia and always feel anxious about eating at theirs as I have no idea if I'm going to get ill.
I am of course happy to eat out of date bread, fruit, veg etc if no visible mould on it. But draw the line at expired fresh food!!!
We had a New Years Eve party and FIL bought a load of expired cooked meats and party food nibbles (all expired Christmas day). Obviously people had no idea and ate them
hopefully no one got ill, or maybe they thought it was just a hangover!
Would you serve guests food like this (ie. you may eat it yourself at home, but would you serve it to guests)?