Seeking Portuguese classes (Porto Alegre)

Hi.

I am in PoA for a month. On/off actually, like Protected content a year.

I'm looking for portuguese language classes for beginners like myself.
Any crash-course would be good; I speak english, french and spanish, so shouldn't be a burden ;-). Can read portuguess but lack experience in speaking or even basic grammar.

If you have a school or a person to recommend, I'd be grateful.

Thanks in advance.

Yannis