This dream has to do with sexual repression, first with alcohol and then with cold shower, two ways of dealing with the difficult issues that arise during the emotional and physical maturity process of becoming an adult. Perhaps you have some anxiety about playing the game with everyone else, or the way they play it. Perhaps you are feeling pressured to go futher than you would like to go and some of your peers wish that you would relax and go with the flow, are encouraging you to have a drink as it will help you to do so.