Ines,
If you are a member you are welcome. Membership fee is $20 US, There is a membership application on their website. Look up The Butler Society of Ireland.
Currently about 700 members. About 200 to 300 will attend the rally..
The website also has video of previous rally's. The lectures are concerned with the Irish line currently in power and their past accomplishments.
The Butler family was once the most powerful family in Ireland and is still deeply involved with the current political structure.
What I'm looking forward to is visiting Killkeny Castle and possibly any other Butler Castle we can fit into our stay. There are a number of Butler castles in Europe and at least one more in Ireland.
Regards,
Michael