A bit north and a bit expensive ($30 for rodizio; the only option), but I thought I'd try out Cleo's Brazilian Steakhouse up in San Bruno. Come prepared for all you can eat and conversation. http://www.cleossteakhouse.com/
Join us for fun opportunities to practice your Brazilian Portuguese! All levels are welcome, from beginner to native speaker. All events are laid back and informal. Any interesting Brazilian music and cultural events can also be ideas for events as well.