As tempting as it is to interrupt someone who is speaking to you, don’t do it. If you can restrain yourself and give the person your undivided attention, they will feel more relaxed around you and
Don’t waste a perfectly good networking event by spending all your time with people you already know. It’s okay to spend a few minutes socializing with your friends, but devote most of your time to meeting NEW people. That’s what you’re there for.