We're hosting a NodeSchool (http://nodeschool.io/) hack night. This is great if you're new to Node.js or if you've got something that you want to work on with the community.
You will work through practical and fun tutorials on your own laptop with the help and support of experienced Node.js developers. The lessons will comprise of several exercises for you to complete at your own pace. No previous Node experience is required, but some familiarity with JavaScript would be helpful.