Heilman's restaurant that ran in the Lorain Journal.
The ad's a little curious in that there are no mentions or descriptions of any special Irish menu items. I suspect the whole ad was part of a 'clip book' of prepared artwork that leaves room for a company's name and phone number.
By the way, the long pipe that the leprechaun in the ad is smoking is an Irish clay pipe, which you can read about here.
Happy St. Patrick's Day!