Are True Blood and the various Kardashian reality shows becoming the staple of your culture diet? Maybe it’s time to cultivate an appreciation for art that aims a little higher. Start with a free performance by three rising opera stars at the Metropolitan Opera Summer Series in Brooklyn Bridge Park tonight at 7pm. Bring a blanket and hit the vendors for dinner as you take in arias by sunset. The same night, Smith Street Stage begins a two-week run of Shakespeare’s Macbeth outdoors in Carroll Park from 7-9pm. The show is free but donations are encouraged.