I have never turned down a social occasion because of primal. Almost every social gathering will have SOME sort of food that is mostly primal (i.e. maybe they cooked it in the wrong oil but the shrimp is still primal) . It's a good use of the 80% IMO
OTOH if you are in a zone and want to eat NOTHING you dont prepare yourself, eat before you go, grab a clubsoda with lime and be SOCIAL. Who says you have to eat to go to a party? But dont SAY anything about why you arent eating that relates to your diet. That is full stop tempting them to try to get you to eat. Defending the diet is futile - others see it as attacking them. Learn these phrases:
"Oh, I'm just not hungry right now."
"I'll grab something in a little bit but right now I want to hear about your date!*" (or other about them event - people like to talk about themselves")
"I just had something a little bit ago"
If someone who I know is pushy hands me a piece of cake or something I say thank you and take it and continue my conversation. At some opportunity I put the plate down and just never pick it back up.
MTA: because it is rare I dont have more to say
"When I got too tired to run anymore I just pretended I wasnt tired and kept running anyway" - my daughter Age 7