Hugo S.
Yelp
If Brasília had a beach, that would be the place. There are restaurants, sushi bars, and even a huge surf shop! Its a good place to walk around and check people, but is the most popular tourism spot, so its kind of fancy and very expensive. Its a nice place when wakeboard/wakesurf championships are going on, otherwise, I would recommend a sunset walk or a meeting with friends to know the place.
If you wanna eat, drink and see the locals there are many other better spots.
tips: free parking, good drinks and foods (expensive too).