Sea Circus in not a circus, or by the sea. Don't hold it against them. It's still a really cool place.
What is it? It describes itself as a restaurant, cocktail bar, and hangout den. If you want a cocktail at noon, or a coffee at night, there's no judgement here. Just tasty, delicious drinks.
By the way, they also serve food, including gluten-free food. The breakfast/brunch menu will make you want to stay in Bali forever.