If the bar tender only handed you a beer bottle - sure, don't tip if you don't want to. Although you should, even if it's a single dollar (ie. proportional to w

If the bar tender only handed you a beer bottle - sure, don't tip if you don't want to. Although you should, even if it's a single dollar (ie. proportional to what you are receiving). But if you order some elaborate drink that takes time and skill to craft - you should tip as a way of saying "thanks for the effort". That was the original idea of tipping, after all - ensuring, measuring and providing direct feedback of service quality.