I remember Yankee Stadium (very uncomfortable) in the eighties.
The worst convention was one in Philadelphia in the early eighties. It was so damn hot and we were miserable. There were people there passing out. I went with three older people and we ended up calling it a day and missing Sunday. We headed home instead.
I wondered if the stupid religion realized that when people are miserable at those outdoor venues in the broiling heat of the summer that they get ZERO out of the whole thing. It was a frigging waste of time, resources and energy. The only enjoyable thing out of that whole weekend was seeing the PA country side and going out to eat.
Even when I was still a "believer" I determined to never go to those outdoor conventions again.