exactly the same with me.I use facebook but I can't say I actively chat with people on there. When I play basketball we usually make one of those "events" to get people. Most of the friends list are old buddies from my childhood/high school or people I liked working with.
For the people I hang out with we leave messages on there just to meet up later in the weekend. Sure, we could call each other too but when you read up on what other people are posting, it can also become conversation later on when we meet during the weekend.