If you can go in early July visit the Willie Clancy summer school in Miltown Malbay (W coast, Co Clare). The pubs are full of music and you can register to learn set dancing at various levels, instruments ditto or singing(?), lessons for whatever you've signed up for in the morning, dancing and concerts in the evening.
While you are ther visit theCliffs of Moerr (sp?), or if you were there in June the limestone pavement at the Burren is said to be spectacular.