Machine-made smoke danced in the beams of light in the Concert Chamber as a packed house waited for the musicians to take the stage.
As an attempt to create a KitKat Klub atmosphere it wasn't entirely successful - the tiny tables didn't help much either - but it set the tone for a polished performance by erstwhile Fur Patrol frontwoman Deans: a baker's dozen of numbers from the back catalogue of the Divine Miss M.
The selection ranged over Mitchell's first eight albums - Amelia from 1976's Hejira was the most recent cut, a Bolero-like version of Cactus Tree from the 1968 debut Song to a Seagull the earliest.
The set as whole was marred by a poor sound mix - Sean Donnelly's bass and Tom Broome's drums (even with a tea towel damper) were unpleasantly dominant, drowning the more melodic runs of Robin Kelly on piano and Paul McLaney on guitar.
As a result, and unsurprisingly, the songs that worked best were those most sparely arranged: an eerie Rainy Night House and a spellbinding piano-only rendition of the title track from Blue were standouts.