RSF has greatly improved my offline social life as well as its online counterpart. I’m always in tune with what’s going on with my friends without having to beat the information out of them via AIM or random phone conversations. And gatherings are planned within minutes without having to resort to mass emails.
If you have trouble keeping in contact with offline friends, start an online forum. Make it private to keep the strangers out and you’ll always have a secret clubhouse where you can talk all the shit you can possibly want.