There is a group of cats at my SOs work like that. He keeps one in his office and the other four roam around. He has had them all fixed and one of them has been there over 16 years. His office kitty is 12 years old, and one of her litter mates and her mother is there.
All females. The grandmother, mother, 2 granddaughters. They are all friendly and talkative and come right up to you.
Office Kitty who is Buddie has to have injections 2x a week for her arthritis, and my SO does that. She also has to go in regularly for her nail trimming.
The other three have shelter and go outside as well, and while they are thinner than Buddie, none of them seem to be arthritic. Buddie got to the point where she could barely walk and it was just awful watching the poor kitty.
The injections have helped tremendously.