1. A system comprising: an event database including event data records; a product database storing, on a data storage device, product records and product category records; an event-product merchandising module, executable by a processor of at least one computing device, providing event-product merchandising services including at least one service that, in response to a request, returns one or both of one or more product listings and product categories as a function of an event record in the event database that is related to the returned product listings and product categories.