 Some 3.5 million visitors each year contribute more than $400 million to the local economy.More recently a collection of like-minded businesses in Lincoln Park, an old rundown blue-collar neighborhood with high unemployment and poverty rates, was cultivated by a group of entrepreneurs who have begun rebuilding and revitalizing the area.Since 2014 at least 25 commercial real estate transactions have occurred and 17 businesses have opened, including restaurants, breweries, coffee shops and artist studios.