One thing that I've regretted not teaching my cat when he was younger was how to go on quick walks outside on a leash. I remember seeing a community neighbor go on walks with her two dogs and three cats daily and thought that it was the most adorable family gathering I have seen yet. The cats were aware of cars that come by and would have fun within the plants, but still keep up with their owner.
One thing I have noticed is that cats are easier to train to walk with a leash when you have dogs. It's almost like cats look up to the dogs and want to be just like them or even better. So if you happen to have a dog and adopt a cat, then you can definitely have an easier time training!
Has anyone taught their cats to walk on a leash? How long did it take you? Did you also have a dog at the time?