One thing most geeks have in common is the ability to process information. Most of us don't have great social skills because we don't participate in social events but even more so we don't pay attention when we're in these situations. When you're in social group, push aside your latest paradigm and actually watch what other people are doing, its easy to pick out the people with the best interpersonal abilities. Watch them but don't mimic, instead find similarities in yourself (your interpersonal muscles) and then start working them out. Walk up to people and introduce yourself. Its hard at first but eventually it'll come naturally.