Dear pb50,
I have had PCS for a long time (7 years). But I have had a sense of humor since I was born. After I disclose that I have PCS if I sense any awkwardness in the conversation, or if I say something that is not quite right, I smile broadly and say “Sorry Brain Damage”! That usually gets them laughing and the conversation can continue. Hopefully if you can accept it and move on, that gets them to accept it and move on. It has worked for all of my friends and new acquaintances and when they smile hopefully, you and hopefully they can move on with the conversations.
Good Luck! Let us know if it works for you.