What a disappointing response to valid points. Unfortunately, because what these people are asking you to be is well beyond what a normal job entails and they are essentially saying they value you putting on a "fake" persona rather than having a professional work-focused employee, this is probably going to end up with you finding a position elsewhere or adopting the fake social butterfly role in order to fit in/have any success moving around within the company.

I've been in this position before - it's hard. Once my boss actually "required" me to go on a department canoe trip for a day (a Saturday, not a day we worked). and I left the job shortly after that because it was clear that wouldn't be the last non-work activity they would demand of me.