https://hire-ruby-developer.today/blog/how-to-host-ruby-coderetreat-workshop

Coderetreat is a full day practice workshop, which could be also shorten to 4-hours-long, intensive practice event and it would perfectly fit to the format of a regular Ruby Meetup. The Coderetreat event has a standard format, even though there are different forms and flavors. We usually use Pair-Programming and Test Driven-Development to implement Conway’s Game of Life and delete your code at the end of each session.