What is a "session beer"?

A session beer is defined as a beer that has a lower alcohol content, typically around 3% to 5% ABV, enabling the drinker to enjoy multiple servings over an extended period—hence the term "session." The lower alcohol level promotes social drinking without the adverse effects commonly associated with higher-alcohol beers, making it ideal for gatherings or prolonged events. This concept embraces the idea of moderation, allowing people to savor the flavors and characteristics of the beer throughout the evening while still maintaining their ability to engage in conversation and activities.

The other answers present concepts that don't align with the definition of session beer. For example, serving beer in small glasses for tastings does not pertain to alcohol content or the ability to drink for an extended time. High alcohol content beers are contrary to the session beer concept, as they would not allow for prolonged drinking sessions. Lastly, while beers can certainly be brewed for special seasonal events, this characteristic does not relate to the alcohol content or the idea of enjoying beers over an extended period without significant intoxication.