Last week, the ELB and I went to a Peep show. The arts council is housed in one of those old theaters that had been renovated. They were showing movies made by the various schools and organizations in the community. And I sat in the theater seat without issue. The arms were not digging into my hips. In fact, the ELB actually complained about how uncomfortable the seats were while I was ecstatic about how I was able to fit!
Don't get me wrong, there was little leg room--and both the ELB and I are almost 6 ft tall--but he is normal sized and doesn't have issues fitting places.
I always smile when I read about Holly at www.300poundsdown.com and her various posts about fitting in seats. Now I understand the simple joy of fitting. So you'll probably see more NSV seat posts as I move further into my journey.