Suggestions for what on earth a formal dresser can wear to a stadium rock concert in the summer????

[Claywrangler]

Sounds ridiculous I know, but I don't know what to wear. I went to loads of concerts when young and probably always wore jeans. Nowadays I don't own any jeans, trousers or skirts, I always wear dresses. I don't do casual very well (hourglass) especially in the summer and I always wear heels ( or Birkies on the beach😀). We will be seated. The weather could be very hot, or not. And we will be there for hours. Especially confused as to what to wear on my feet.

Wiggle dress and low wedge sandals. Thin cardi.

Wear what you wear. It's not like you'll be pogo-ing in the mosh pit

Well, I had thought I would do the 50s wiggle look, because that suits (and I have stuff), but I wondered if I could wear wedges? We are seated but I assume we'll be standing iyswim. And whether I'd look really out of place? Not too bothered about that though as I know I'll look better dressed how I want than in a pair of jeans.