LA Weekly Pick of the Week:   For 23 years, the indefatigable promoter Ronnie Mack has been putting on his monthly Barn Dance concerts, lending crucial exposure to such key rockabilly, roots and country stylists as Dwight Yoakam, Rosie Flores, Mike Stinson and James Intveld. It’s clearly a labor of love, with Mack seemingly motivated by nothing more than a purist’s desire to present authentic Americana music in contrast to the distressing artifice spilling out of the Nashville pop factory. For tonight’s special anniversary concert, he’s assembled a massive lineup of the Barn Dance’s longtime regulars and favorite performers. While there are too many great names to mention here, be sure to catch Rosie Flores, the evocative country-rock revisionists I See Hawks in L.A., boozy Southern-rock rowdies the Groovy Rednecks, and rockabilly legend Ray Campi, who likes to jump on and thrash his curiously indestructible standup bass. They’ll be joined by such stalwart Barn Dance veterans as Patty Booker, Rick Shea, Kathy Robertson, Rip Masters and Russell Scott, as well as recent L.A. Weekly cover gal Lynda Kay, whose new CD, Dream My Darling, segues seamlessly from shimmering country idylls to authentically fiery rockabilly ravers. (Falling James)