My university Zen group is having a one day sitting in Dublin on June 21st (Midsummer's Day). We will start at 10am and end at 5PM. It will be held in the city centre at this venue: http://www.oscailt.com/
We are just renting a practice room at the venue. It is our own event and is not being advertised elsewhere.
Any Treeleafer that wants to is welcome to attend. Just let me know in advance.