Most of the friends I stay in touch with now are from university or grad school. From uni most of my friends are from a club I was a member of (traditional chinese cultural club). My grad program was very small, so most of us knew each other and were on relatively good terms.
I don't live in the same city as any of them anymore, in most cases we don't even live in the same country. We mostly keep in touch talking online and maybe playing some games here or there. So been close to 20 years since I made any new "close friends".
I am on friendly terms with most of my coworkers now, but I wouldn't really call any of them close friends.