I'm in a city and currently don't own a car. We end up buying groceries through delivery services like instacart or peapod. If the service fails to deliver, which happens more frequently than we want, we kinda just deal with not having the food we wanted. Sometimes that means esti g a substandard meal, sometimes it means eating some frozen food we had and turning the other ingredients into a different meal the next day. It's extremely incovienent but it's better than walking to s supermarket or all the problems that come with car ownership in a city

Edit:we also ended up eating out at about an average of 2.5 nights a week every year which is much higher than when I lived in a rural area with a car