The Week is great for music, dancing and hard, shirtless bodies. If you are going alone and without local friends, and you don't look the part, you are bound to meet no one. You'll look just like the old perv hanging out at the playground -- seriously. If you can't enjoy The Week for the experience it is without feeling like a total failure if you didn't make a sex date, then you are probably better off avoiding it.
Several of my Brazilian friends love the place. Others hate it. If you remember the big gay dance circuit party clubs in Manhattan (or London, or Paris) that lasted until 9 am, where many shirtless muscled men would dance tweaked off recreational pills, then this is the Brazilian version.
Some of the GPs I know well like to go there to hang out with friends, but never to make new clients. That would be an awkward situation for them as they are usually with some friends who don't know they are garotos.