Heard ethnic music, got to identify it (sounded like a spanish sousa march!)

[stultus]

So I was walking down the street in an ethnic (latino/portuguese/polish/etc) section of town and somebody tooled down the road with this fantastic music pouring out of their car. It sounded vaguely spanish (espagna spanish, maybe). Sort of like a cross between a sousa march and what I'd think of as traditional spanish music. Really great trumpet, percussion, etc. Anyone have any ideas what sort of music I might have been listening to? Got any artists/composers I could use as a starting point?