Late Seventies-- I remember one of my sisters did not pass Wardrobe Check (Yes, we had it!) for Open House one rush. We wore long dresses and it was a garden party theme. I remember the dress she had- navy blue sleeveless poly with bright flowers and a low neckline with a pointy white collar. So she was hunting down an acceptable substitute. I gave her the one I wore the first year I rushed on the other side, which I had also worn to a formal. It was white cotton pique with a bright red floral trim ruffle on the bottom, on the straps (sleeveless) and down the front vertically, with some kind of buttons.
Then I borrowed my former roomate's dress after I went shopping but could not find a Malia-type dress like she told me to last minute. The dress of hers that I wore was a long sleeveless A-line shift in a pink & green small print on a white background. It was very plain but had a large ruffle down the front. I wore it with a hot pink thin leather belt with a gold frog buckle (frogs on both sides, they buckled in the middle, remember those)? I also had a multicolored ribbon belt with large lions that fastened the same way and I wore it everywhere.
I worked at a big department store during the summer and breaks so I always had a discount when I bought my clothes. I wasn't very preppy and got teased for it -this was the south- but I always had fashionable clothes and sisters frequently borrowed from me. I remember one time telling 2 sisters that they could each borrow the same dress for a formal (I forgot) then having to decide who was going to wear it and what the other one could wear. I'll admit that I borrowed clothes, especially shoes too.
I remember being as fixated on clothes and what I was going to wear as these PNM's now seem to be. I think that it is part of life when you are young. I seemed to always be shopping then.