Progressive, eclectic Main Street in Santa Monica is notable for its green businesses. With organic cafes and boutiques catering to environmentally conscious living, this shopping street just steps from the Pacific is a great place to go green. But on St. Patrick’s Day, going green means something else altogether. Between Hill Street and Rose Avenue, Main is prime for a bar crawl — with taverns, lounges and alehouses aplenty — making it an ideal place to toast the Irish spirit…