Yes. I have noticed the correlation between the obesity epidemic and the lowering of standards of public attire.
Most people nowadays could not fit into the tailored clothing of the 1980s and 1990s.
I remember my mum taking me to Paris for my 16th birthday. We both got new outfits, which were fitted skirts, fitted tops, tailored jackets, tailored pants and lovely blouses. (When I think of it, she would only have been 40, and so petite).
We even wore the dresses for sight-seeing during the day, and changed for dinner in the evening. My mum was a clerk in an office, it's not as though we were from the landed gentry. But people had pride.
In the 90s I had a boyfriend who loved Vegas; we went about half a dozen times.
We would dress decently by day and in the evening go back to the hotel, shower and change for dinner and the evening out. I'd wear a cute short dress and he'd wear chinos and jacket, or a dark suit with open shirt and no tie. It was fun to dine at a good restaurant and then visit the tables at the upscale casinos. I went to Vegas a few years ago with my sister and it was just slob, slob, slob, everywhere.