When the Irish get together for a ceili, you can be certain that a grand time will be had by all. In this case the celebration is the ninth annual 1st Irish Theatre Festival under the artistic direction of George C. Heslin, which runs from September 1st to October 3rd. 1st Irish is an annual event of shows, as well as special events and parties out-of-competition, hosted by diverse arts organizations across the city. This year, on the performance side, 1st Irish showcases eight original theatrical productions from Belfast, Northern Ireland, Dublin, New York and Toronto, playing at various venues in New York.