CET, if you do end up going to the sea music concert (I'd recommend it) go early so you can take in the sights of the seaport before hand. Sometime afterwards they end up sing in some sort of drinking place & you'd want to catch that too. Good luck & have a blast. If you want to chase down any Celtic/Irish sessions ask Dan Milner (he's part of the New York Packet), he'd be very up to snuff about such things.

Barry