Bartending at a club is a different animal than working at your local neighborhood pub. The bartenders that work in night clubs usually have years of experience. They have likely started their careers in corporate theme restaurant types of bars or even hotel/motel bars. They are familiar with a variety of drink recipes and may have advanced skills in mixology or whiskey.
Nightclubs are generally bigger and busier than a neighborhood pub. As a result, they often have more tables and dance floors. This means the bartenders have to work fast and efficiently. They need to be able to read the crowd and know how to interact with guests in a fun and friendly manner. They also need to be able to make decisions quickly and firmly, especially when confronting a patron that is clearly intoxicated.
Many bartenders enjoy striking up a conversation with their customers, while others are more comfortable with quiet drinks. Knowing what type of customer you are dealing with will help you decide how much to chat and what types of drinks to recommend.
The interviewers at a club will ask you questions about your past bartending experience that are different from the standard interview questions for any other bartending position. For example, the interviewers may want to know how you would handle a patron that you suspect is underage or using a fake ID. They may also ask you how you calculate the cost of a drink so that they can see how well you understand the formula.