1970s building are “Brutalist”. I actually like it. DC Metro is the best example of that architecture.
I was TDY at Templehof AB in Berlin at a AF Communications conference in 1990. I decided to go into East Berlin. This was only months after the Wall fell. I wanted to see what the Communist architecture looked like closer than we could when the Cold War was still a thing.
I took the U-Bahn with some other GI friends to Alexanderplatz Station, which used to be blocked by the East German army, so the train just went thru it without stopping. Now they could. Got upstairs to see the massive Soviet style buildings. It was a cold winter day, and here where these magnificent tan stone megaliths up against a deep blue sky. Not even many doors or windows, but I saw one door and window down the street aways...
We walked over to it, and then we read the sign above the door, “International Sex Shop”. The one window had a blowup doll with the O face in a black bra and suspenders, with a few Color Climax VHS tapes propped up below it.
Had a good laugh, and mentioned it at the conference luncheon. The aide to the AFIC/SC asked me where it was. After lunch we showed them. Got some good pictures of the Colonels walking out with shopping bags (stuff they bought earlier, but who would know). Made sure we got the sign in the photos.