I live in Brazil for two years now.
There are few things Brazilians love:
-> Beer,beer,berr-ice cold, caipirinha-you can find ont he internet how to do it-it's typical drink.
-> Many of Brazilians love sertanejo music, but I think you can find any kind of Brazilian music on Pandora, for example.
-> Food: Barbecue.
-> If you think of doing some kind of decoration, use their colours-yellor,green and blue. They will love it.
I am not sure about some dirnking games or different activities but I bet you can get some ideas from some of your Brazilian friend. And they are easy to satisfy...very happy people. :)