Come on out and hack!
We'll pair up to work on writing a Lisp in Ruby. My colleague, Mark Grant, has written a set of RSpec tests for the basic Lisp statements and we'll use them to guide our programming. This will give you not only some practice with Ruby but also with test-driven development (with the tests already written for you) and a look at Lisp syntax.
All Rubyists are welcome, including beginners. Bring your laptop with Ruby installed.
Enova International, our hosts, will provide food and drink.