So has anyone checked out The Latvian Folk Music Collection?  It's a pretty great starting place for anyone interested in the localized song traditions of this again-independent Baltic republic.  
  If I were you, I would definitely check out "Perkonitis," by the Dancu Muzikas Grupa, the lead off track on Danco Dievis.  It showcases a youthful vitality that makes clear these Latvians like to dance. 
 Come correct and check out some MP3's  
here .