TAM lounges are ok, but they are tiny. I've used the ones at GIG, SDU, GRU and POA. They're artful, they're clean, the desk girls are nice. Food is iffy, and again, they're small.
On a related note, and it's soon to be a moot point, can anyone explain why the busiest airport in the country - CGH - does not have a TAM lounge? Other than the fact that it is the most disorganized, clueless airline operations in the hemisphere?
Guys who don't do domestic flying in Brasil will never understand that while they are a bit nicer than the international operations, the level of confusion and insanity is an order of magnitude higher.