Rankin Twin powers, activate! Form of a country duo! Shape of a sister act! With a debut album now out in Moonshine & Maybes, The Rankin Twins blend country, bluegrass and pop. The Texas-based siblings open for Curtis Grimes at 9:30 p.m. Friday at Wormy Dog Saloon, 311 E. Sheridan. Tickets are $6. Call 601-6276 or visit wormydog.com.