If you were hoping to celebrate St. Patrick’s Day at one of our new local Irish restaurants, you may be out of luck. Lahinch, which was scheduled to open this month in the former Benny’s space at Cabin John Shopping Center, has run into the usual construction delays. “Unfortunately, it looks like we won’t be open for St. Patrick’s Day,” says owner Barry Nolan, who also operates the Irish Inn at Glen Echo. “We’ll know more in a week.” (For more on Nolan and his plans for Lahinch, click here for our Oct. 29th issue.) Also missing out on St. Patrick’s Day crowds is Finnegan’s Wake Irish Pub, a new venture from local entrepreneurs that originally was supposed to open last fall at Rockville Town Square. No word yet on the timetable for that one.