When serving an alcoholic beverage with a side mixer, what is a proper practice?

Chilling the side mixer and serving it together with the alcoholic beverage is the proper practice because it enhances the overall drinking experience. Many cocktails and drinks are best enjoyed when the components are served cold, as this can help to preserve the flavors and maintain the desired temperature of the drink. Serving the mixer chilled allows for a refreshing contrast to the alcohol, especially in warmer climates or settings. This practice also encourages the consumer to enjoy the beverage as intended, creating a cohesive flavor profile and maintaining the quality of the drink.

The other options do not align with standard bartending practices. For instance, serving the mixer warm can detract from the taste and enjoyment of the drink. Similarly, a side mixer served at room temperature may not provide the refreshing experience that a chilled mixer offers. Finally, serving the mixer after the beverage has been consumed is impractical, as it defeats the purpose of pairing the mixer with the drink. The ideal approach is to present both the alcoholic beverage and its mixer in a way that complements each other, enhancing the overall enjoyment of the experience.