In narrowing down your options for bartender services, the vetting process can be likened to a delicate dance of discernment. Pouring drinks is more than just a mechanical action - it is an art, a choreography that, when seamlessly executed, adds a layer of elegance to your event. Thus, the selection of a proficient bartender service is a crucial determinant of the success of your social gathering.

To hasten your decision-making, we have distilled the process into seven quintessential inquiries to pose before committing to a particular bartender service.

• Firstly, what is the team's level of expertise and experience? Bartending is an intricate craft that marries precision and creativity. Akin to the Pareto principle, 20% of the bartenders are likely to yield 80% of the quality and efficiency. Hence, investing time and resources into securing a top-notch service is pivotal. Ascertain the team's level of proficiency and experience by delving into their portfolio, client testimonials, and relevant certifications.

• Secondly, what is the bartender-to-guest ratio? This ratio is critical as it directly influences the quality of service your guests receive. According to the Harvard Business Review, high traffic situations are where the quality of service matters most. A lower ratio ensures your guests will receive prompt and personalized service, thus enhancing their overall experience.

• Thirdly, what cocktail repertoire does the service offer? The world of mixology is as vast as it is intriguing, with the Euclidean principle of combinations coming into play. The number of cocktail combinations is vast, making it essential for the service to have a wide variety of offerings. This can cater to the varying tastes and preferences of the guests, thus ensuring a delightful experience for all.

• Fourthly, what is the service's protocol in case of an emergency? The laws of probability dictate that unforeseen situations might occur, and it is critical to ensure that the service has a robust contingency plan in place. For instance, if a bartender falls ill, is there a backup who can seamlessly step in?

• Fifthly, how does the service handle inventory management? This aspect goes beyond mere stocking and extends to waste management, spillage control, and optimal use of supplies. Advanced inventory management techniques, like the Just-in-Time approach, could be employed to minimize wastage and maximize efficiency.

• Sixthly, how compliant is the service with local health and safety regulations? This is particularly important in light of the current pandemic situation. Ensuring compliance with local health advisories, sanitation protocols, and safety regulations is non-negotiable.

• Lastly, what is the service’s cancellation policy? These are, after all, uncertain times and flexibility is paramount. Ensure you understand the terms of service before you sign a contract.

The strategic importance of bartending services is underpinned by the game theory. The stakes are high, and the payoff is potentially substantial - an extraordinary event that leaves your guests with a memorable experience. Therefore, careful consideration and meticulous vetting of these services cannot be stressed enough.

In summary, the choice of bartender services can make or break your event. By asking these seven questions, you tilt the odds in your favor, ensuring a splendid gathering. After all, as George Bernard Shaw said, "Alcohol is the anesthesia by which we endure the operation of life." And who better to administer this anesthesia than a skilled, professional bartender service?