 They were also sometimes called "temperance taverns".In the past, the bars quite often asked their patrons to sign a pledge of temperance, meaning that they would abstain from intoxicating liquors; today's wave of alcohol-free bars are frequented by both teetotalers and drinkers who wish to have fun in a drink-free environment.The recent popularity of alcohol-free bars is fueled by the declining usage of alcohol amongst the millennial generation, as well as the increased availability of information regarding the negative effects of alcohol on health.