Check out some of the best local art in town and head to the 78th street studios Third Friday Art Walk. Tour the more than 50 galleries which will open their doors from 5:30 to 9 tonight. And cheer on the Cavs as they take on The Boston Celtics down at the Quicken Loans Arena tomorrow night at 8:30. Can’t make it inside? There will be a Cavs Fan Fest outside the arena starting at 5:30 tomorrow.