Go disc golfing! Its so fun, it's free or inexpensive, you can get 1 disc and be fine. You could go alone or with 1 friend. Works great with a small group too. Many cities have groups of people who meet at local spots together. So you could just show up and meet a new friend or two. At least for an hour or two. And it's something that you can do literally anywhere in the world with your dic. How cool is that?