There were attempts at ring building, in the USSR.

#circle
https://en.wikipedia.org/wiki/The_Round_Houses_in_Moscow
The diameter of the structure is 155 meters (around 500 feet). It has 26 entrances, 913 apartments and six big archways to enter the courtyard. The first floor of the building contained pharmacies, shops, hair salons, a laundry and tailor shop, also a children's club, and even a library. The isolated courtyard has its own park, with playgrounds for kids and feels like it is a long way away from the busy town. The rooms here are not rectangular but more like trapezoids, which makes it harder to place furniture.
Also the courtyard has bad acoustics – a small noise echoes a lot.
Critics complained that it used up too much land, compared to the typical rectilinear #housing projects.