When is it appropriate to retain yeast in a beer bottle before serving?

Retaining yeast in a beer bottle before serving is particularly appropriate when a consumer specifically requests it. Some beer enthusiasts appreciate the presence of yeast because it can enhance the flavor profile and contribute to a fuller mouthfeel. Yeast sediment can also serve as a form of natural carbonation that is desirable in certain styles of beer, especially those that are bottle-conditioned, which rely on residual yeast for carbonation and flavor maturation.

Though bottle-conditioned beers generally contain yeast, this is more about the nature of the beer rather than an automatic practice for all beers. The consideration for serving yeast largely depends on the preferences of the consumer. If someone enjoys yeast in their beer, serving it in the bottle along with the yeast can improve their drinking experience.

In contrast, factors such as room temperature or whether the beer is served on draft are less related to the choice of retaining yeast. Temperature can influence the flavor and aroma of the beer, but does not specifically dictate whether yeast should be included. Hence, while there may be contextual scenarios where yeast is retained for specific reasons, the key factor here is the individual's preference.