In Dublin 8th until 12th August, in which case you will miss the session at Devitts (Thursday nights). There is a staged session in Temple Bar at the "Oliver St.John Gogherty" but it is very touristy, distinctly unfriendly and normally comprises of three musicians who sit around with their backs to the audience playing mainly to amuse themselves. No tunes are ever announced and the breaks between those tunes tend to get longer and longer.

Where abouts are you staying? I would recommend the Harcourt Hotel in Harcourt Street (leading off Stephens Green). Lots of people playing in Dublin that night end up there and it is a great place to find out where to go the next night.

Friday nights Merchant O'Sheas on the Stephens Green side of the Liffey - go down to the river and turn left, keep walking up river until you come to a bridge, Merchant O'Shea's is on one side of the road and just opposite is the Bray Head Hotel (oldest in Dublin) of the two the Bray is the better, also good on Saturday night.

Sunday - O Donaghues (of Dubliner Fame) session (mainly tunes) on the Sunday afternoon from about 4 o'clock in the afternoon, its a small pub so get there early. Before going to O Donaghues try Mother Redcaps near Christchurch - best singing session I have ever listened to. This starts earlier around 1 o'clock and ends about 4.

Enjoy your trip

All the best.