Back around 1990 I had a chin-up bar in my apartment in Chicago. I probably could only do a few at a time back then. I don't think I've tried to do one since then.

I won't see my trainer again until Dec 5. I'll try to remember to mention it to him and see if I can do any then. That way we can both laugh about it if I can't do one (rather than just looking silly by trying and failing when I'm working out by myself.)