Subterranean

Both sources give the same night and time, but neither confirms recent activity.

An open-mic listing site names a Tuesday 10:00 PM 'AllYoungGiants Open Mic' at Subterranean [s1]. The Venue's Website lists a named 'AllYoungGiants Open Mic' with a ticket-purchase link [s2]. That corroborates the listing site's claim as a real, named event. A later visit for a specific date instead turned up an unrelated touring act, and a guessed events page failed to load, so the 10:00 PM time was not reconfirmed.