I never understood why somebody would fuck around with spiking drinks with exotic drugs when they could simply ask the bartender to keep refilling the target's

I never understood why somebody would fuck around with spiking drinks with exotic drugs when they could simply ask the bartender to keep refilling the target's drink. Alcohol is by far the most likely drug to be used in these scenarios. I'm certain it happens sometimes, but I doubt it's even a fraction of a percent of claimed cases.