I need names!

I need the actors and actresses who played the following Wildheart roles!

The black lady who was the secretary to Richard Thomas's sherriff character:

The hispanic girl who hung around Haley Hirch's character in the L.A. skateboarding scenes:

Various people line-dancing and the band members playing the country music in the dance-hall scene:

I know this movie didn't use CGI(except maybe for overhead outdoors scenes), and I know the country band wasn't some kind of CGI creation!

Anyone know?