On my most recent trip to New Orleans, I rented a bike and pedaled my way along Esplanade to City Park for Voodoo Fest. It was Halloween and the crowds were appropriately attired. One man wore a chef's apron--and nothing else. I was disguised as an intrepid Brooklyn reporter (skinny jeans, glasses, puffy vest, Superga sneakers). I ordered a beer and sat on the grass and listened (with a whole slew of costumed teenagers) to 21 pilots. It was basically perfect.
City Park is gorgeous in its own right and worth the trip. Bonus: En route, you'll pass by one of New Orleans' most famous cemeteries and the park is within spitting distance of Parkway Bakery & Tavern. Enough said.