A row has erupted over a top Paris nightclub's offer of free drinks to women who bare their breasts for a polaroid picture pinned onto the wall.

The controversy surfaced after a shocked female nightclubber spotted a noticeboard with the offending snaps behind the bar at the Wanderlust club, in Paris' 13th arrondissement with an accompanying message in English reading: "Tits = shot."

Daggers are drawn on social media over whether the offer at the trendy club, with its panoramic view from the roof of Paris' iconic green fashion and design museum, was a sexist affront or a bit of festive fun.