Cork Jazz Festival is both a warning and an attraction! Every year during October Cork plays host to the Guinness Jazz Festival. During this time hotels are booked solid, the pubs are crammed with people listening to live Jazz and the all taps serve Guinness. Most of the pub venues are free but wall-to-wall jazz in the Jurys & Metropole hotels and in the Opera house are ticket only affairs and sell out fast.
Avoid this weekend or book early depending on whether you like jazz or not!