In anticipation of the upcoming performance by Aida Cuevas with Mariachi Aztlán (see 4 Friday listing), local professional artists and educators present a participatory lecture-demo exploring the roots, history, and defining characteristics of mariachi music. 7–8:30 p.m., Cahoots, 206 E. Huron. Mask required if Washtenaw County is in the CDC’s high-risk category. $15 ($49 includes a ticket to the Nov. 4 show). Space limited; pre-registration recommended at ums.org/performance/ums-101-mariachi-2022 (register for workshop 1775.202). 764–2538.