Singapore nightclub attempts to thwart drunk drivers using urine-analysing toilets - photo 1Singapore nightclub attempts to thwart drunk drivers using urine-analysing toilets - photo 2Singapore nightclub attempts to thwart drunk drivers using urine-analysing toilets - photo 3Singapore nightclub attempts to thwart drunk drivers using urine-analysing toilets - photo 4Singapore nightclub attempts to thwart drunk drivers using urine-analysing toilets - photo 5Singapore nightclub attempts to thwart drunk drivers using urine-analysing toilets - photo 6