Hacktables are single session barcamp workshops. You can organize one on a topic you're interested in or want to spread knowledge about. You can hack anything from business processes over daily life and from hardware to knitwear.
"Hello, I'm very interested in your group! I have a degree in Music Technology, and have worked a little with Arduinos, but I would love to learn more. I studied percussion and love to make electronic music a new musical instruments with computers."