I’m sending this post out to Bayou Child.
These guys are playing a vira. This is typical of the way this dance is played. Portuguese players typically use triple-row boxes with three voices tuned to a wide-open musette for that carnival tremelo effect you hear over and over in Portugese folk music. They refer to their instruments as concertinas as opposed to accordions.
Here is a corridinho. These tunes are in 4/4 and they are usually played fast. I’ve posted this one before – in fact I’ve posted both of these before – back on my old blog I think. This one is short but I really like this guy’s playing.
Here’s one more for good measure. Hold onto your hat.
These guys are cookin. The single drum is often used to great effect. I’ve also heard spoons and once, at a bar on College St. in Toronto, I heard an older woman accompany a squeezebox player on triangle.
27th Street 
I have a serious soft-spot for Cajun and Zydeco music. Thanks for the video!
I have visited Portugal, but interestingly, I heard more Portuguese folk music in Toronto.
We have waltzes
which you probably heard and maybe even danced when you visited here-these are much faster and happier sounding-ours seem closer to Irish (but not as sad) this is great music and I bet some of it is played at special occasions. Have you visited Portugal, or did you learn this kind of music from living in ‘Little Azores’ neighborhood? I think you’d really love Creole music and dance too-rich history. You love Zydeco like I do-very similar.