Sports clubs (not necessarily serious ones) are great if you're into that. Just make sure to actively try to build friendships outside the sports as well. I.e.

Sports clubs (not necessarily serious ones) are great if you're into that. Just make sure to actively try to build friendships outside the sports as well. I.e. ask if they want to get beers, hang out, etc. Treat it almost like dating. Also I'd recommend shopping around when looking at sports clubs. When I first got to Stockholm, I ran regularly with 4 different clubs. After about 4 months, I was mainly hanging out with one of the clubs that was the most social. It felt like I had a full social life there within a couple weeks of moving there.