We have a large, beautiful condo in Copacabana - with a fully stocked kitchen, big living room (with TV), comfortable bedroom, and spa-like bathroom. You'll also have access to the pool and gym, if you'd like to use those.
We're just a block from the beach (less than a 5minute walk), and also near to RioSul shopping mall. The nearest metro station is Cardeal Acoverde, which is about 10 minutes walk away.