Elephant bells! (What you called "super bell bottoms.") Mine were high-waisted, (Dad's gf made them for me. Even back then I preferred high-waisted, because of what they now call muffin top. lol) Do you remember that girl that tripped from the huge bell bottoms? You know, right in front of the entire class? Yeah. That was me. lol
It does pain me to see how many did not stay with the Lord since the Jesus Movement.
As for business attire? In 1979, I started going to a new church and liked it. I always wore clean jeans and a nice shirt, (end of disco era, so still had plenty. I was a disco diva, although my attire was closer to KC from KC and the Sunshine Band than Donna Summers, but at least you can imagine the clean shirts I wore.)
One of the women took me under her wings. I was looking for a new job, because my last ended. (Working for that rehab. It was a job through a grant, and the grant lasted 11 months.) I knew it was going to be a short-term job, so I had saved for the end, to keep me going until I found a new job, but she just thought I was broke. The church was kind enough to give some money for me to get job-interview clothes. So, she and I picked out a few outfits to mix and match, and then the next church service I came back in my clean jeans and nice shirt.
Her face dropped and she asked me why I wasn't wearing the new clothes, so I told her because this wasn't a job interview. Only then did I notice all the other women were wearing the kind of skirts and dresses she just bought me. Oopsie. The clothes were really a hint I should dress nicer. I think I shocked her when I told her the Lord has seen me sitting on a toilet, so it's too late to impress him by my outfit.
Thankfully, they didn't push it. Matter of fact, I ended up catching the eye of a guy because I wasn't wearing the uniform of most of the women. We've been married for 37 years now, and those people were friends from our old church -- the one where I really did get dressed to the nines one Saturday -- on our wedding day.
We just reconnected with many from that old church through FB recently. (How did everyone turn old since then? lol) Some of them have chuckled seeing me in jeans still. But they laughed because that's so me.
Meanwhile, you're right, the Lord really has been growing us over the decades. MAN! I feel like I grow at the speed of a jade plant -- it takes a really long time, but when I look back 40 years, I see he has changed me in some good ways.