Open Mics in Ontario, CA

The venue's events page lists this event, but may not be current.

The venue's own shows page did not mention an open mic on Aug 31, 2026 [s2]. It showed the same on Sep 1, 2026 [s3]. On Sep 5, 2026, a made-up address on the same site showed nearly identical content, so that silence cannot be trusted to reflect what is really on the page [s4]. Sign-ups are by an emailed audio or video clip, not a walk-in list, so whether this counts as an open mic is unresolved.