portuguese school - late afternoon classes (Rio de Janeiro)

Hello everyone,

I just got to Rio a week ago and I am looking for any school that could provide late afternoon classes of Portuguese. Unfortunately, all of them can offer only mid-day classes. Since I work it is impossible for me to attend them. I do not want private teacher's lessons, I would like to interact with other while studying.

Any suggestions? Thanks a lot in advance :)

Piotr