Jenny Boyle has scoured the countryside in search of good blues music, hitting juke joints from Chicago to New Orleans.

But the retired telecom worker from Petaluma knows sometimes the sweetest sounds come from your own backyard.

On Saturday, Boyle and boyfriend Glen Gulick made the short trip to the city fairgrounds for the Petaluma Wine, Jazz & Blues Festival.

The couple danced in the grass under a glaring sun as Charlie Musselwhite and others cranked out their favorite tunes.

?We?re just very bluesy people,? said Boyle, taking a swig from a glass of ros?between numbers. ?It?s for a good cause.?

Profits from the one-day event ? in its second year ? will be donated to support music programs in area schools.

However, this year?s contribution will be light because high temperatures and the sour economy cut turnout in half, said Cliff Eveland, the festival?s executive director.

The event, which ran from about noon to 8 p.m., drew 650 paying customers compared with about 1,300 last year, he said.

If it is to continue next year, organizers might have to drop tickets prices again or find another way to promote what many consider a great deal, he said.

?We heard over and over again: ?This was a great party. Too bad nobody came,? said Eveland, a music teacher at Petaluma High. ?The weather and the economy together have not been our friends.?

The high temperature Saturday in Petaluma was 96 degrees. The mercury climbed to 100 in Santa Rosa.

Still, there was fun to be had.

For the adult admission of $40, festivalgoers were treated to music from headliners including Musselwhite, Joe Louis Walker and Booker T.

Also playing was the Peter Welker Sextet featuring Jeff Oster, Twice as Good and the Casa Grande High School Alumni Band.

The admission included four tastes from more than 80 wineries set up within sight of the three stages.

Food, including Chicago-style hotdogs and catfish po-boys, was available for a price at more than a dozen booths.

One of the more popular stops on the scorching day was the beer booth, run by teachers, parents and other volunteers.

?They?re drinking a little beer today,? said Bob Raines, a principal at Alexander Valley School near Healdsburg, whose two sons were in the Petaluma High band. ?We have folks coming up and handing us an extra $5 after they buy their beer. They understand it?s for the kids.?

Retired school secretary Sharon Clarke found other ways to do her part.

With the sun beating down on her face, she shelled out $4 for a bright yellow parasol and cocked it on a shoulder as she listened to the blues.

And in a silent auction, she won an acoustic guitar signed by Musselwhite that will pump $450 into the system.

?I love music,? Clarke said. ?Having worked for a school district, I know what hard times they are having.?