How did religious festivals in ancient Greece and Rome combine worship with commercial activity?

In ancient Greece and Rome, the distinction between religious ritual and secular life was not as rigid as it is in the modern West, allowing festivals to seamlessly integrate the worship of gods with urban commercial activity.1

Religious festivals served as major public events that drew large crowds, creating natural opportunities for trade and commerce. Because these societies did not separate the sacred from the secular, festivals functioned as both a time for honoring deities through sacrifices, processions, and games, and as a venue for economic exchange. For example, the Olympic Games and other major festivals involved elaborate rituals, such as sacrifices and libations at altars, alongside athletic contests and state banquets that brought people together from across the region.12

Similarly, in Roman practice, festivals were often times when business was suspended, yet the gatherings themselves facilitated social and economic interaction. The integration of these spheres meant that the celebration of the gods and the conduct of daily urban commerce were mutually reinforcing aspects of public life.31