Why is the fountain area referred to as a fountain?

The area is referred to as a fountain primarily because it serves soda water. The term "fountain" in this context traditionally refers to a setup where carbonated beverages, including soda, are dispensed. This is rooted in the historical context of soda fountains that were common in drugstores and diners, where patrons could enjoy carbonated drinks. Thus, the primary function of serving soda water contributes to why the area is designated as a fountain. In contrast, while decorative features, historical significance, or ice cream service may be present in some similar establishments, they do not define the primary characteristic of a fountain in the context of this question.