The all-volunteer, nonprofit Desert Bluegrass Association hosts free public jam sessions monthly. The first Sunday, 3 to 5 p.m.: Udall Recreation Center, 7200 E. Tanque Verde Road, 296-1231. The third Sunday, 3 to 5 p.m.: Music and Arts Center, 8320 N. Thornydale Road, No. 150-170, 579-2299. The third Thursday, 6:30 to 8:30 p.m.: Pinnacle Peak Restaurant, 6541 E. Tanque Verde Road, 296-0911. The fourth Sunday, from 4 to 6 p.m.: Thirsty's Neighborhood Grill, 2422 N. Pantano Road, 885-6585. Call the phone number provided for each venue for more information.