The original Red Room (320 E. Colfax Ave., 303-830-7050) was dressed in the wrong shades and awkward accents. It missed the mark completely and looked like a lounge past its prime.

Red Room, a new “bar within a bar” in Westside Costa Mesa, is officially open for business. The venue at 719 W. 19th St. is adjacent to Holiday, a speakeasy-themed bar and lounge with the same ...