GRU is now the Espaço Banca Safra, and I saw the AMEX lounge team directing AF people there.
MVD features access to the Aeropuertos VIP Club Partidas. I apologize for not getting pictures. Amenities feature hot food (empanadas and what looked like fried chicken or a thick milanesa), cold food, soft drinks, a Lavazza coffee machine, spirits beer, wine (Deicas), a children room, a day rest room, individual bathrooms. Didn't see a shower, but there coulda been one back there.