In my observation, some cities that have "OK" public transit, people can make-do without cars if they Uber, Zipcar, traditional rentals, walk, and use transit. I also observe that it involves a lot of juggling and probably not regular well-outside-of-town trips.

Absent driving yourself at all, you're going to be very limited most places. Which may be OK for continuing a college lifestyle but mostly doesn't work unless you have a partner who handles the driving.