Security mindset time! This invention is cool, but relies on either staff telling customers, or customers all being informed. In the former case, it is unreali

Security mindset time! This invention is cool, but relies on either staff telling customers, or customers all being informed. In the former case, it is unrealistic to expect to staff to be able to carry this out at a busy bar, and weird stuff happening to uneducated customers would only either freak them out, or make them go "cool new glasses!". In the case of customers being informed, I go and acquire a range of interesting drugs that might have the desired effect, and test them until I find one that isn't caught. Or, y'know, just go back to surprise extra alcohol and a bit of social coercion when that alone isn't enough (discounting here any extra kicks from the other effects of any drug on the victim).