Hi Asian explorer.
it is always nice to know a few words in the language of the country you are visiting but thanks to google translator you do not need to learn Portuguese.
Few hints about São Paulo:
1) Where to stay?
I would suggest near Avenida Paulista. It is close to Lagoa, safer than other neighborhoods, lots of daily attractions (museums, restaurants, bars, shops)
2) Saunas
There are 2 main saunas with GPs (rent men): Lagoa and 555. Both are close to Paulista. Lagoa has more options, 555 tends to have fewer guys.
3) Massage places
I need to visit the ones in Thailand, but form what I have read it is not the same thing. However, they ar a good option to meet guys. I would suggest: inhouse, Lotus and Gold. All of them have websites where you can select the masseur and send a WhatsApp to the place scheduling a session with the guy of your choice.
When are you planning to visit?