During the Fall of Reach in August 2552, the Covenant placed a communications jammer in the club. During the evacuation, troopers located the jammer, but were pinned down by Hunters. The jammer was later destroyed by SPARTAN-B312.
- The club's name is a reference to Claude Errera, the founder and webmaster of Halo.bungie.org.
- The Club Errera segment in the Halo: Reach campaign level New Alexandria features an easter egg. If specific buttons are hit, such as one near the hospital, you may enter with either "Siege of Madrigal" or "Never Surrender." Jiralhanae will serve as the DJ and bartenders while several Grunts dance. You will not be attacked unless you kill a dancing covenant or destroy the jammer.
- The layout of the club is identical to the layout of the Halo 3: ODST Firefight map, Crater.