I think you'll find that there will be a few things that slow down extracurricular activities as you go through life. I was a free soul before I got married. I came and went, partied, nationally ranked mtn biker, aspiring semi-pro soccer player, and all around fly fisherman. After I got married and finished up with college I slowed down quite a bit. House/yard work, efforts to the marriage, and work filled in a lot of my extra time. After a year of being married I realized I wasn't doing the things that made me...ME! I slowly got back into mtn biking, played on some adult indoor soccer teams, and fly fished quite a bit more. Tennis came back after my brother started inviting me to go play again. Suddenly I was overwhelmed with activities, marriage, work, house/yard work, etc. Then we had kids. I pretty much gave up everything except fly fishing as a hobby. As the kids get older I find it much easier to get out and do the things I love, just not as often.
I work full time and have roughly 15 people that I work with that play tennis. We get out a couple days each week and play during a long lunch break. I also found a local league and have met a few people that love to play tennis as well.
Currently I'm getting out 3-4 times each week. However, I haven't been on a bike in months, and my old racing bike has the receiver for the kids trailer. My fishing time has been reduced a bit but it's because at the moment I'd rather occupy one day on the weekend to play tennis and the other for hanging out with the family. I take my kids fishing a few times each year and still got to Montana once a year for a week.
Life is a balancing act. Too much of anything can ruin a marriage or career. You just have to find balance. You'll also have to be prepared to sacrifice. Concentrate on your career, get in good standing wiith the company and you too could be out for 2 hour lunch breaks playing a bit of tennis.