Nothing wrong with being polite.

They exclude you in saying good night? They don't just give a general goodnight to the entire group?

At least you've pinpointed the point of your days that bring about anxiety.

Another point that came to mind, when considering my own work experience. I'd started in this field right after my divorce. Quitting wasn't an option. I've observed hostile environments, literally. I eventually ended up managing a district kitchen, then someone became injured and I filled this role, as their van driver(school kitchens, btw) and I interact now with everyone.

What came to mind, was how I go from not being in any specific kitchen then walk in...sometimes on conversations, etc. Each group has their own culture, so to speak, so it's tough to really fit in, as the minutes spent together for bonding aren't there. Their bonds are tighter for being together more. Or so it seems. Because I really don't get involved, as I kept to myself the best that I could when I started--didn't want to talk about what transpired in my life, just wanted to work my hours and head home, I find myself better off emotionally and professionally.
Sometimes people don't either realize they aren't being inclusive or they don't realize others want to be included, yet, see....it's the social structure bringing about anxiety

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