I gave up pretty much "everything" except running while my son was growing up. Then, when he quit sports at age 16, I found myself with a lot of time on my hands. And that was a GOOD thing. That happened when I was about 50, and I'm 68 now.
I joined a neighborhood bowling league (with my wife). I was not a very good bowler (160-165) when I stopped bowling at age 22 (when I got married and moved out of state), and when I started back I was a little bit worse. Over a year or two I actually read a book on bowling - I had never looked at it seriously - and brought myself up to the 190-195 level, where I remain. I still bowl in a league with my wife, but also bowl in a slightly-more-competitive mens' league.
I renewed my enjoyment for playing tennis, mostly doubles. I joined a group that plays every Saturday morning, and joined a neighborhood "ladder" that allows me to play singles when I want to. I took a few lessons to bring myself up to a tolerable level, but really, with tennis, if you look around you can find people "at your level" to play with, no matter how good or bad you happen to be. The important thing is to get out and experience some competition.
I took up golf, which is a mixed thing to be sure. A lot of fun and a lot of aggravation and frustration as well. My wife golfs with me once a week or so, but I also golf with a group of men (all retired now), and in a 9-hole league. During Summer, I probably golf 3 times a week - two nine-hole sessions and one full round of 18.
I have two pretty good bicycles and I ride at least once a week, on roads with one and in hilly parks with the mountain bike. Nothing serious, but where I live in Western Pennsylvania, there is no such thing as a completely relaxed ride. You are always doing hills, some of them killer hills, no matter what. Road biking is near the top of things I enjoy doing, although statistically it's probably the most dangerous.
As you might expect, a perpetual flow of minor injuries prevents me from doing just about everything from time to time, except bowling, but I work through the injuries and within a month or so, am back to tennis, biking, or whatever. I stopped running a few years ago when an injury kept me from it for a while and I did some research that made me conclude that it is a very questionable way to get exercise. Details if you like.