There is an open session at Hot Springs Village, Arkansas, on the last Saturday of each month. Here is the address:
The Last Chance Cafe
408 Ponce de Leon Drive
Note that this is a gated community. If you tell them at the gate you are there for the Irish session they will direct you to the Cafe.
Sessions start at 6:30 pm and run till about 11:00pm. There is wondeful food here and the atmosphere is very friendly and inviting. These session usually run 12-15 musicians.
Many months there is also another Saturday session at the Village, see the ACMS website for details.
These sessions are sponsored by the ACMS (www.celticmusiclive.com).
--James