The prelude to Prem Sahib’s recent exhibition “Night Flies” was “Bump,” a kind of buzzing pop-up club that opened one summer evening and remained until the wee hours. Having used the Southard Reid gallery, normally closed in August, as a studio that month, he then transformed the space into a private club for a single night. He created a blue-lit chill-out room on the ground floor, and wall-to-wall tan carpet covered the upstairs room, which was also fitted out with a large revolving mirror ball; the rear office became a crowded bar.

However, rather than taking the raging party, or even the