For a quick overview of CoffeeScript check out Aseem Kishore's "Introduction to CoffeeScript" slides here
CoffeeScript LA are a group of professionals so in love with CoffeeScript they've developed their own tutorials. They started this meetup to show others why they enjoy developing in CoffeeScript and to interact with others who are also using CoffeeScript.
Some programming experience is assumed. For people who are new to CoffeeScript they'll provide self-paced tutorials. For people who are further advanced they'll have projects to work on and talk about, people to argue with.