It means being restless, unhappy and dissatisfied at the end of a job to be done, a place to go or an organization to be involved in. To have a drink at home in a dream and then regret it means doing things that will cause you to feel embarrassed towards your family elders and not be able to look at them. Having a drink in a tavern in a dream and then regretting it means not taking advantage of an opportunity correctly, exceeding the dose of a word or action, that is, going out of purpose, and being in bad situations when it is actually to be enjoyed.