In 1999, a student named John Gayewski at the University of Pennsylvania was declared that he needed a way to earn money, do something fun and meet a woman, there was a bartender. Everything he took in the world of opportunity was robbed. So, early in the summer, John decided to take a 40 hour bartender course at Cherry Hill, New Jersey. During the course, the teacher taught John to remember drinks, get better hints, how to set up a bar, and a complex way of cleaning the bar.
People do not seem to understand what the bartending shift is. There are several hours of preparation time, cleaning for several hours, and dealing with demanding people who do not know the actual duties of the bartender. The bartender has to go to work at 10 am, but the restaurant is open until 12 noon and the restaurant closes at 11 pm, but the bartender will not depart until 1 AM. It is a 4 hour free service. In addition, a valid bartender may need to separate the shift from an invalid bartender and must pay for it. Your hint covers the time of dialogue with customers, so 4 hours of free labor will not harm anyone. *satire
I have been ridiculed for seven years, and I hope that those who take all the changes from the bar and leave without leaving the tip do terrible things. Anyone who has worked in a non-chain restaurant will say that the bartender (and service) is not sneaky. It is a craft that needs a deep understanding of food and spirit, diplomatic refueling and long-term physical labor. However, this is often a job performed for secondary minimum wages and is supplemented by some techniques that you hope to be subdivided into hourly average worthy of time. So for me it is a crime worthy of your own circle in hell that you can not intentionally tilt your bartender.
I think that bartending is always one of the purest form of experience design. A good bartender knows that guest fun depends on the ability to understand and predict stranger's needs, feelings, behavior. It is hard work and often appreciation, but that is one of the most interesting and rewarding tasks I have ever experienced. I do not think it will irritate customers, but I am the last person to say that you should avoid suggesting innovative behavior. Probably let's fraud ordinary customers to order new products, try different kinds of wines, or sit on a different table. Still, it is often best practice to help your guest to follow a bit (at least) resistance.