Babatunde Lea and Friends Date: Friday, April 5 Time: 7:30 p.m. Paul Mahder Gallery, 222 Healdsburg Ave., 800-838-3006 Tickets: $20 It’s the annual return of the Operation Jazz Band artists, Babatunde Lea and Friends. Throughout the previous week, they’ve been helping local 5th graders in Healdsburg schools understand the underpinnings of jazz in their classrooms. Azar Lawrence (tenor sax), Bill Ortiz (trumpet), Gary Brown (bass) and Frank Martin (piano) will