Ipanema main stretch won't offer you much in terms of surf quality, but Aproador is fun, in a kind of chaotic way. You will need to hustle to get a wave, but there is a satisfaction in getting one amongst the masses.
The beaches to both west and east/North of Rio are fun, with one particular town that offers a couple of surprisingly consistent, powerful spots that are nowhere near as busy as the metro area.
There was a really nice swell comming through yesterday at aproador! Head high, lots of power and not too steep, still definitely a shortboard wave. Chaos is right! Dodging people in the line up here is worse than rockaway NY