Some specific dreams will be set in the backdrop of a bar with you working in the bar as a server or a waiter/waitress. This is indicative of many things. Such a dream suggests that you will encounter a situation that will take you by surprise.
You might also be surprised due to someone's kind gesture at the workplace. If you see yourself selling wine or beer to people in your dreams, it suggests that you will exhibit intuitive skills and organizational skills in your work arena in the future.