L, aged 34
In a bar in a group of three. We put our drinks on a shelf which was on the edge of a balcony near the front door. I had turned to my friends and said I would wait with the drinks so they could have a dance. As I turned back to the drinks a man was leaning over and putting something in them. Literally took 10 seconds. I obviously lost it, called over the staff and doorman. The drinks were taken away and all tested positive for substances with a testing kit they had behind the bar. However, the men still had time to finish their drinks, wink at me before strolling out of the pub. My friends were a little dubious at first, thought I was overreacting, even made me doubt myself, but I knew what I had seen. I was absolutely devastated and the night didn’t last much longer.