Blues guitarist Debbie Davies has musical roots in Texas and Chicago, as shown on her Blind Pig debut Picture This. Obvious comparisons aside—yes, she sings like Bonnie Raitt with less catarrh—the Handy Award nominee wields a Strat with the sensual swagger of Albert Collins. No wonder—she spent three years as the late legend’s lead picker. Davies appears Thursday at 8:30 p.m. at Tornado Alley, 11319 Elkin St., Wheaton. $7. (301) 929-0795. (Michael Dolan)