Cabaret and variety review: The Swell Mob, Assembly George Square Studios

Once every evening – twice on weekends – throughout the Fringe, the door of an underground garage creaks open and a group of unsuspecting Fringegoers enter a phantasmagorical Victorian saloon populated by a cast of gothic grotesques – wheeler dealers, divas, harlots and mystics – and a very cute docile Beagle sitting in the corner unconcerned by their murky business.