How does uni work in America?

In the UK we have 2 types. Campus and non campus. I went to a campus because I targeted that. Meant I and everyone I knew cycled or walked less than a mile to uni and everything was on top of each other. Also the uni was within walking distance of town centre (most people got a taxi on a night out though tbf). The other option is a non campus which could be somewhere like London and spread out all over the bloody city but you might only have to go to a couple of locations (London is transit friendly though) or somewhere like Oxford which is a non campus but the uni is built into the city fabric in a time before cars, it’s everywhere but everywhere is walkable in Oxford if you live close enough to the city.

This is a long way of saying for a most people that go to uni they don’t have a car and live in a “15 minute city” it’s the first time seeing something work like that. Lots of people miss a lot of uni and that campus lifestyle is certainly one of them. Is that how it is in American uni or does every take their car to go to the gym/lecture/night out.