It is true that some people are more natural networkers than others. In fact, introverts could be considered the least natural networkers. Being an introvert does not mean a person is shy, however. Introverts just need a reason to network. Social situations are the bane of an introvert, but a networking event with a purpose could intrigue you. Find a reason to be at the network event. Does it offer educational time? Is it a structured event or is there a compelling speaker?
Or, do some cyber-stalking. If you know the names of some people that will be at the event, check out their social media accounts See if you can find a common ground, or a good topic so you can go up to them without commenting on the weather.