Bluegrass music doesn’t get any more authentic than the stylings of Ed Neff, mandolin/fiddle player extraordinaire. Take some pals down to the Willowbrook Ale House at 3600 Petaluma Blvd. North on Thursday nights, order yourself a brew and a cheeseburger, and check out the pickin’ and grinnin’. His band, Blue & Lonesome, has been holding down the fort on Thursday nights for almost 15 years. Information: 775-4232.