I have the same problem of saying no without causing offence. One Christmas, a close family member asked me, quite bitterly “what’s the matter with you?!” when I was very reluctant to play a silly “game” involving false chins/mouths/moustaches made out of cardboard. Not very hygienic either - this was before COVID when we were less aware, but still unhygienic. The main thing is, though, that I hate to draw attention to myself/make myself look stupid (I’ve always been the same, but probably worse now I’m older - late 60’s - and uglier!) On another occasion, we were encouraged to play a word game where you read out a very upsetting/harsh scenario from a card which contains rude language and swear words and others guess the answers. It may be called Cards against Humanity? I wasn’t comfortable with this, but went along with it. I quite “enjoyed” watching others play this game, in a way, but I was squirming, red faced and almost tongue-tied when it was my turn to ask the question. I think others enjoyed watching my intense embarrassment, which I found slightly cruel. Not my idea of fun. I have been told I have a keen sense of humour by several people, and I believe that to be true, but I just don’t like making a fool of myself and never will. I do like card games, quizzes etc and find them very entertaining. And sitting chatting, eating, drinking - that’s more me!