Check out these upcoming crawls:
March 16, 17 and 18 in Manhattan, organized by pubcrawls.com: http://pubcrawls.com/saint-pattys-pub-crawl-nyc.php
Saturday, March 17 in Manhattan, organized by barcrawls.com: http://barcrawls.com/newyork#/shamrock-shuffle-nyc
Saturday, March 17 in Williamsburg, Brooklyn, organized by Murphguide.com: http://tickets.murphguide.com/Events/ShowEvent.aspx?eventId=15478
Did I omit a crawl? If so, send me a comment here and I will gladly add the crawl to this list.