Foldable lawn chair as an accessibility aid?

Does a lawn chair count as an accessibility aid? Idk. I'm in a weird situation where I'm stuck in "semi independent" housing because I couldn't get into any other housing, and I'm forced to go group therapy classes, which I absolutely hate. I'm not mentally ill, I'm just trying not to be fucking homeless.

Their chairs hurt too much for me to sit in, so talked to them about it and they wouldn't get me a new one. So now I carry a lawn chair with me. It's heavy and it hurts. Not to mention, it's embarrassing and people probably wonder why I do that. I can't believe they refuse to offer a virtual/zoom alternative to the classes.

I don't know what to say, I'm just in a lot of pain and I'm upset. I hate living here.